About the Number
184413509280
2進数表記:10101011101111111001101101011010100000
漢数字表記:千八百四十四億千三百五十万九千二百八十
素因数分解:
素因数の和:4210
約数の個数: 1152
約数和(自身を含む): 872416935936
約数和(自身を除く): 688003426656
約数列:
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 20, 21, 22, 24, 26, 28, 30, 31, 32, 33, 35, 36, 39, 40, 42, 44, 45, 48, 52, 55, 56, 60, 62, 63, 65, 66, 70, 72, 77, 78, 80, 84, 88, 90, 91, 93, 96, 99, 104, 105, 110, 112, 117, 120, 124, 126, 130, 132, 140, 143, 144, 154, 155, 156, 160, 165, 168, 176, 180, 182, 186, 195, 198, 208, 210, 217, 220, 224, 231, 234, 240, 248, 252, 260, 264, 273, 279, 280, 286, 288, 308, 310, 312, 315, 330, 336, 341, 352, 360, 364, 372, 385, 390, 396, 403, 416, 420, 429, 434, 440, 455, 462, 465, 468, 480, 495, 496, 504, 520, 528, 546, 558, 560, 572, 585, 616, 620, 624, 630, 651, 660, 672, 682, 693, 715, 720, 728, 744, 770, 780, 792, 806, 819, 840, 858, 868, 880, 910, 924, 930, 936, 990, 992, 1001, 1008, 1023, 1040, 1056, 1085, 1092, 1116, 1120, 1144, 1155, 1170, 1209, 1232, 1240, 1248, 1260, 1287, 1302, 1320, 1364, 1365, 1386, 1395, 1430, 1440, 1456, 1488, 1540, 1560, 1584, 1612, 1638, 1680, 1705, 1716, 1736, 1760, 1820, 1848, 1860, 1872, 1953, 1980, 2002, 2015, 2016, 2046, 2080, 2145, 2170, 2184, 2232, 2288, 2310, 2340, 2387, 2418, 2464, 2480, 2520, 2574, 2604, 2640, 2728, 2730, 2772, 2790, 2821, 2860, 2912, 2976, 3003, 3069, 3080, 3120, 3168, 3224, 3255, 3276, 3360, 3410, 3432, 3465, 3472, 3627, 3640, 3696, 3720, 3744, 3906, 3960, 4004, 4030, 4092, 4095, 4127, 4290, 4340, 4368, 4433, 4464, 4576, 4620, 4680, 4774, 4836, 4960, 5005, 5040, 5115, 5148, 5208, 5280, 5456, 5460, 5544, 5580, 5642, 5720, 6006, 6045, 6138, 6160, 6240, 6435, 6448, 6510, 6552, 6820, 6864, 6930, 6944, 7161, 7254, 7280, 7392, 7440, 7812, 7920, 8008, 8060, 8184, 8190, 8254, 8463, 8580, 8680, 8736, 8866, 8928, 9009, 9240, 9360, 9548, 9672, 9765, 10010, 10080, 10230, 10296, 10416, 10912, 10920, 11088, 11160, 11284, 11440, 11935, 12012, 12090, 12276, 12320, 12381, 12870, 12896, 13020, 13104, 13299, 13640, 13728, 13860, 14105, 14322, 14508, 14560, 14880, 15015, 15345, 15624, 15840, 16016, 16120, 16368, 16380, 16508, 16926, 17160, 17360, 17732, 18018, 18135, 18480, 18720, 19096, 19344, 19530, 20020, 20460, 20592, 20635, 20832, 21483, 21840, 22165, 22176, 22320, 22568, 22880, 23870, 24024, 24180, 24552, 24762, 25389, 25740, 26040, 26208, 26598, 27280, 27720, 28210, 28644, 28889, 29016, 30030, 30690, 31031, 31248, 32032, 32240, 32736, 32760, 33016, 33852, 34320, 34720, 35464, 35805, 36036, 36270, 36960, 37143, 38192, 38688, 39060, 39897, 40040, 40920, 41184, 41270, 42315, 42966, 43680, 44330, 44640, 45045, 45136, 45397, 47740, 48048, 48360, 49104, 49524, 50778, 51480, 52080, 53196, 53651, 54560, 55440, 56420, 57288, 57778, 58032, 60060, 61380, 61905, 62062, 62496, 64480, 65520, 66032, 66495, 67704, 68640, 70928, 71610, 72072, 72540, 74286, 76384, 78120, 79794, 80080, 81840, 82540, 84630, 85932, 86667, 88660, 90090, 90272, 90794, 93093, 95480, 96096, 96720, 98208, 99048, 101556, 102960, 104160, 106392, 107302, 107415, 110880, 112840, 114576, 115556, 116064, 120120, 122760, 123810, 124124, 126945, 127937, 131040, 132064, 132990, 135408, 136191, 141856, 143220, 144144, 144445, 145080, 148572, 155155, 156240, 159588, 160160, 160953, 163680, 165080, 169260, 171864, 173334, 177320, 180180, 181588, 185715, 186186, 190960, 193440, 198096, 199485, 203112, 205920, 212784, 214604, 214830, 225680, 226985, 229152, 231112, 240240, 245520, 247620, 248248, 253890, 255874, 260001, 265980, 268255, 270816, 272382, 279279, 286440, 288288, 288890, 290160, 297144, 310310, 312480, 317779, 319176, 321906, 330160, 338520, 343728, 346668, 354640, 360360, 363176, 371430, 372372, 375557, 381920, 383811, 396192, 398970, 406224, 408573, 425568, 429208, 429660, 433335, 451360, 453970, 462224, 465465, 480480, 482859, 491040, 495240, 496496, 507780, 511748, 520002, 531960, 536510, 544764, 558558, 572880, 577780, 580320, 590161, 594288, 620620, 635558, 638352, 639685, 643812, 660320, 677040, 680955, 687456, 693336, 709280, 720720, 726352, 742860, 744744, 751114, 767622, 797940, 804765, 812448, 817146, 858416, 859320, 866670, 895559, 907940, 924448, 930930, 953337, 965718, 990480, 992992, 1015560, 1023496, 1040004, 1063920, 1073020, 1089528, 1117116, 1126671, 1145760, 1151433, 1155560, 1180322, 1188576, 1241240, 1271116, 1276704, 1279370, 1287624, 1300005, 1354080, 1361910, 1386672, 1396395, 1407307, 1441440, 1452704, 1485720, 1489488, 1502228, 1535244, 1588895, 1595880, 1609530, 1634292, 1663181, 1716832, 1718640, 1733340, 1770483, 1791118, 1815880, 1861860, 1877785, 1906674, 1919055, 1931436, 1980960, 2031120, 2042865, 2046992, 2080008, 2127840, 2146040, 2179056, 2234232, 2253342, 2302866, 2311120, 2360644, 2414295, 2482480, 2542232, 2558740, 2575248, 2600010, 2686677, 2723820, 2773344, 2792790, 2814614, 2860011, 2950805, 2971440, 2978976, 3004456, 3070488, 3177790, 3191760, 3219060, 3268584, 3326362, 3380013, 3437280, 3466680, 3540966, 3582236, 3631760, 3723720, 3755570, 3813348, 3838110, 3862872, 4062240, 4085730, 4093984, 4131127, 4160016, 4221921, 4292080, 4358112, 4468464, 4477795, 4506684, 4605732, 4622240, 4721288, 4766685, 4828590, 4964960, 4989543, 5084464, 5117480, 5150496, 5200020, 5311449, 5373354, 5447640, 5585580, 5629228, 5633355, 5720022, 5757165, 5901610, 5942880, 6008912, 6140976, 6355580, 6383520, 6438120, 6537168, 6652724, 6760026, 6933360, 7036535, 7081932, 7164472, 7263520, 7447440, 7511140, 7626696, 7676220, 7725744, 8060031, 8171460, 8262254, 8315905, 8320032, 8443842, 8584160, 8852415, 8936928, 8955590, 9013368, 9211464, 9442576, 9533370, 9657180, 9851149, 9979086, 10168928, 10234960, 10400040, 10622898, 10746708, 10895280, 11171160, 11258456, 11266710, 11440044, 11514330, 11642267, 11803220, 12017824, 12281952, 12393381, 12665763, 12711160, 12876240, 13074336, 13305448, 13433385, 13520052, 13866720, 14073070, 14163864, 14300055, 14328944, 14894880, 14968629, 15022280, 15253392, 15352440, 15451488, 16120062, 16342920, 16524508, 16631810, 16887684, 16900065, 17704830, 17911180, 18026736, 18294991, 18422928, 18885152, 19066740, 19314360, 19702298, 19958172, 20469920, 20655635, 20800080, 21109605, 21245796, 21493416, 21790560, 22342320, 22516912, 22533420, 22880088, 23028660, 23284534, 23606440, 24786762, 24947715, 25331526, 25422320, 25752480, 26557245, 26610896, 26866770, 27040104, 28146140, 28327728, 28600110, 28657888, 29553447, 29937258, 30044560, 30506784, 30704880, 32240124, 32685840, 33049016, 33263620, 33775368, 33800130, 34926801, 35409660, 35822360, 36053472, 36589982, 36845856, 37180143, 38133480, 38628720, 39404596, 39916344, 40300155, 41311270, 41600160, 42219210, 42491592, 42986832, 44684640, 45033824, 45066840, 45760176, 46057320, 46569068, 47212880, 49255745, 49573524, 49895430, 50663052, 50844640, 53114490, 53221792, 53733540, 54080208, 54884973, 56292280, 56655456, 57200220, 58211335, 59106894, 59874516, 60089120, 61409760, 61966905, 63328815, 64480248, 65371680, 66098032, 66527240, 67550736, 67600260, 69853602, 70819320, 71644720, 73179964, 74360286, 74843145, 76266960, 77257440, 78809192, 79832688, 80600310, 82622540, 84438420, 84983184, 85973664, 88660341, 90133680, 91474955, 91520352, 92114640, 93138136, 94425760, 98511490, 99147048, 99790860, 101326104, 104780403, 106228980, 107467080, 108160416, 109769946, 112584560, 114400440, 116422670, 118213788, 119749032, 123933810, 126657630, 128064937, 128960496, 132196064, 133054480, 135101472, 135200520, 139707204, 141638640, 143289440, 146359928, 147767235, 148720572, 149686290, 152533920, 157618384, 159665376, 161200620, 164654919, 165245080, 168876840, 169966368, 174634005, 177320682, 180267360, 182949910, 184229280, 185900715, 186276272, 197022980, 198294096, 199581720, 202652208, 209560806, 212457960, 214934160, 219539892, 225169120, 228800880, 232845340, 236427576, 239498064, 247867620, 253315260, 256129874, 257920992, 266108960, 270401040, 274424865, 279414408, 283277280, 292719856, 295534470, 297441144, 299372580, 315236768, 322401240, 329309838, 330490160, 337753680, 349268010, 354641364, 365899820, 371801430, 372552544, 384194811, 394045960, 396588192, 399163440, 405304416, 419121612, 424915920, 429868320, 439079784, 443301705, 457601760, 465690680, 472855152, 478996128, 495735240, 506630520, 512259748, 523902015, 540802080, 548849730, 558828816, 585439712, 591068940, 594882288, 598745160, 640324685, 644802480, 658619676, 660980320, 675507360, 698536020, 709282728, 731799640, 743602860, 768389622, 788091920, 798326880, 823274595, 838243224, 849831840, 878159568, 886603410, 931381360, 945710304, 991470480, 1013261040, 1024519496, 1047804030, 1097699460, 1117657632, 1152584433, 1182137880, 1189764576, 1197490320, 1280649370, 1289604960, 1317239352, 1397072040, 1418565456, 1463599280, 1487205720, 1536779244, 1576183840, 1646549190, 1676486448, 1756319136, 1773206820, 1862762720, 1920974055, 1982940960, 2026522080, 2049038992, 2095608060, 2195398920, 2305168866, 2364275760, 2394980640, 2561298740, 2634478704, 2794144080, 2837130912, 2927198560, 2974411440, 3073558488, 3293098380, 3352972896, 3546413640, 3841948110, 4098077984, 4191216120, 4390797840, 4610337732, 4728551520, 5122597480, 5268957408, 5588288160, 5762922165, 5948822880, 6147116976, 6586196760, 7092827280, 7683896220, 8382432240, 8781595680, 9220675464, 10245194960, 11525844330, 12294233952, 13172393520, 14185654560, 15367792440, 16764864480, 18441350928, 20490389920, 23051688660, 26344787040, 30735584880, 36882701856, 46103377320, 61471169760, 92206754640, 184413509280]
約数ペア:
[(1, 184413509280), (2, 92206754640), (3, 61471169760), (4, 46103377320), (5, 36882701856), (6, 30735584880), (7, 26344787040), (8, 23051688660), (9, 20490389920), (10, 18441350928), (11, 16764864480), (12, 15367792440), (13, 14185654560), (14, 13172393520), (15, 12294233952), (16, 11525844330), (18, 10245194960), (20, 9220675464), (21, 8781595680), (22, 8382432240), (24, 7683896220), (26, 7092827280), (28, 6586196760), (30, 6147116976), (31, 5948822880), (32, 5762922165), (33, 5588288160), (35, 5268957408), (36, 5122597480), (39, 4728551520), (40, 4610337732), (42, 4390797840), (44, 4191216120), (45, 4098077984), (48, 3841948110), (52, 3546413640), (55, 3352972896), (56, 3293098380), (60, 3073558488), (62, 2974411440), (63, 2927198560), (65, 2837130912), (66, 2794144080), (70, 2634478704), (72, 2561298740), (77, 2394980640), (78, 2364275760), (80, 2305168866), (84, 2195398920), (88, 2095608060), (90, 2049038992), (91, 2026522080), (93, 1982940960), (96, 1920974055), (99, 1862762720), (104, 1773206820), (105, 1756319136), (110, 1676486448), (112, 1646549190), (117, 1576183840), (120, 1536779244), (124, 1487205720), (126, 1463599280), (130, 1418565456), (132, 1397072040), (140, 1317239352), (143, 1289604960), (144, 1280649370), (154, 1197490320), (155, 1189764576), (156, 1182137880), (160, 1152584433), (165, 1117657632), (168, 1097699460), (176, 1047804030), (180, 1024519496), (182, 1013261040), (186, 991470480), (195, 945710304), (198, 931381360), (208, 886603410), (210, 878159568), (217, 849831840), (220, 838243224), (224, 823274595), (231, 798326880), (234, 788091920), (240, 768389622), (248, 743602860), (252, 731799640), (260, 709282728), (264, 698536020), (273, 675507360), (279, 660980320), (280, 658619676), (286, 644802480), (288, 640324685), (308, 598745160), (310, 594882288), (312, 591068940), (315, 585439712), (330, 558828816), (336, 548849730), (341, 540802080), (352, 523902015), (360, 512259748), (364, 506630520), (372, 495735240), (385, 478996128), (390, 472855152), (396, 465690680), (403, 457601760), (416, 443301705), (420, 439079784), (429, 429868320), (434, 424915920), (440, 419121612), (455, 405304416), (462, 399163440), (465, 396588192), (468, 394045960), (480, 384194811), (495, 372552544), (496, 371801430), (504, 365899820), (520, 354641364), (528, 349268010), (546, 337753680), (558, 330490160), (560, 329309838), (572, 322401240), (585, 315236768), (616, 299372580), (620, 297441144), (624, 295534470), (630, 292719856), (651, 283277280), (660, 279414408), (672, 274424865), (682, 270401040), (693, 266108960), (715, 257920992), (720, 256129874), (728, 253315260), (744, 247867620), (770, 239498064), (780, 236427576), (792, 232845340), (806, 228800880), (819, 225169120), (840, 219539892), (858, 214934160), (868, 212457960), (880, 209560806), (910, 202652208), (924, 199581720), (930, 198294096), (936, 197022980), (990, 186276272), (992, 185900715), (1001, 184229280), (1008, 182949910), (1023, 180267360), (1040, 177320682), (1056, 174634005), (1085, 169966368), (1092, 168876840), (1116, 165245080), (1120, 164654919), (1144, 161200620), (1155, 159665376), (1170, 157618384), (1209, 152533920), (1232, 149686290), (1240, 148720572), (1248, 147767235), (1260, 146359928), (1287, 143289440), (1302, 141638640), (1320, 139707204), (1364, 135200520), (1365, 135101472), (1386, 133054480), (1395, 132196064), (1430, 128960496), (1440, 128064937), (1456, 126657630), (1488, 123933810), (1540, 119749032), (1560, 118213788), (1584, 116422670), (1612, 114400440), (1638, 112584560), (1680, 109769946), (1705, 108160416), (1716, 107467080), (1736, 106228980), (1760, 104780403), (1820, 101326104), (1848, 99790860), (1860, 99147048), (1872, 98511490), (1953, 94425760), (1980, 93138136), (2002, 92114640), (2015, 91520352), (2016, 91474955), (2046, 90133680), (2080, 88660341), (2145, 85973664), (2170, 84983184), (2184, 84438420), (2232, 82622540), (2288, 80600310), (2310, 79832688), (2340, 78809192), (2387, 77257440), (2418, 76266960), (2464, 74843145), (2480, 74360286), (2520, 73179964), (2574, 71644720), (2604, 70819320), (2640, 69853602), (2728, 67600260), (2730, 67550736), (2772, 66527240), (2790, 66098032), (2821, 65371680), (2860, 64480248), (2912, 63328815), (2976, 61966905), (3003, 61409760), (3069, 60089120), (3080, 59874516), (3120, 59106894), (3168, 58211335), (3224, 57200220), (3255, 56655456), (3276, 56292280), (3360, 54884973), (3410, 54080208), (3432, 53733540), (3465, 53221792), (3472, 53114490), (3627, 50844640), (3640, 50663052), (3696, 49895430), (3720, 49573524), (3744, 49255745), (3906, 47212880), (3960, 46569068), (4004, 46057320), (4030, 45760176), (4092, 45066840), (4095, 45033824), (4127, 44684640), (4290, 42986832), (4340, 42491592), (4368, 42219210), (4433, 41600160), (4464, 41311270), (4576, 40300155), (4620, 39916344), (4680, 39404596), (4774, 38628720), (4836, 38133480), (4960, 37180143), (5005, 36845856), (5040, 36589982), (5115, 36053472), (5148, 35822360), (5208, 35409660), (5280, 34926801), (5456, 33800130), (5460, 33775368), (5544, 33263620), (5580, 33049016), (5642, 32685840), (5720, 32240124), (6006, 30704880), (6045, 30506784), (6138, 30044560), (6160, 29937258), (6240, 29553447), (6435, 28657888), (6448, 28600110), (6510, 28327728), (6552, 28146140), (6820, 27040104), (6864, 26866770), (6930, 26610896), (6944, 26557245), (7161, 25752480), (7254, 25422320), (7280, 25331526), (7392, 24947715), (7440, 24786762), (7812, 23606440), (7920, 23284534), (8008, 23028660), (8060, 22880088), (8184, 22533420), (8190, 22516912), (8254, 22342320), (8463, 21790560), (8580, 21493416), (8680, 21245796), (8736, 21109605), (8866, 20800080), (8928, 20655635), (9009, 20469920), (9240, 19958172), (9360, 19702298), (9548, 19314360), (9672, 19066740), (9765, 18885152), (10010, 18422928), (10080, 18294991), (10230, 18026736), (10296, 17911180), (10416, 17704830), (10912, 16900065), (10920, 16887684), (11088, 16631810), (11160, 16524508), (11284, 16342920), (11440, 16120062), (11935, 15451488), (12012, 15352440), (12090, 15253392), (12276, 15022280), (12320, 14968629), (12381, 14894880), (12870, 14328944), (12896, 14300055), (13020, 14163864), (13104, 14073070), (13299, 13866720), (13640, 13520052), (13728, 13433385), (13860, 13305448), (14105, 13074336), (14322, 12876240), (14508, 12711160), (14560, 12665763), (14880, 12393381), (15015, 12281952), (15345, 12017824), (15624, 11803220), (15840, 11642267), (16016, 11514330), (16120, 11440044), (16368, 11266710), (16380, 11258456), (16508, 11171160), (16926, 10895280), (17160, 10746708), (17360, 10622898), (17732, 10400040), (18018, 10234960), (18135, 10168928), (18480, 9979086), (18720, 9851149), (19096, 9657180), (19344, 9533370), (19530, 9442576), (20020, 9211464), (20460, 9013368), (20592, 8955590), (20635, 8936928), (20832, 8852415), (21483, 8584160), (21840, 8443842), (22165, 8320032), (22176, 8315905), (22320, 8262254), (22568, 8171460), (22880, 8060031), (23870, 7725744), (24024, 7676220), (24180, 7626696), (24552, 7511140), (24762, 7447440), (25389, 7263520), (25740, 7164472), (26040, 7081932), (26208, 7036535), (26598, 6933360), (27280, 6760026), (27720, 6652724), (28210, 6537168), (28644, 6438120), (28889, 6383520), (29016, 6355580), (30030, 6140976), (30690, 6008912), (31031, 5942880), (31248, 5901610), (32032, 5757165), (32240, 5720022), (32736, 5633355), (32760, 5629228), (33016, 5585580), (33852, 5447640), (34320, 5373354), (34720, 5311449), (35464, 5200020), (35805, 5150496), (36036, 5117480), (36270, 5084464), (36960, 4989543), (37143, 4964960), (38192, 4828590), (38688, 4766685), (39060, 4721288), (39897, 4622240), (40040, 4605732), (40920, 4506684), (41184, 4477795), (41270, 4468464), (42315, 4358112), (42966, 4292080), (43680, 4221921), (44330, 4160016), (44640, 4131127), (45045, 4093984), (45136, 4085730), (45397, 4062240), (47740, 3862872), (48048, 3838110), (48360, 3813348), (49104, 3755570), (49524, 3723720), (50778, 3631760), (51480, 3582236), (52080, 3540966), (53196, 3466680), (53651, 3437280), (54560, 3380013), (55440, 3326362), (56420, 3268584), (57288, 3219060), (57778, 3191760), (58032, 3177790), (60060, 3070488), (61380, 3004456), (61905, 2978976), (62062, 2971440), (62496, 2950805), (64480, 2860011), (65520, 2814614), (66032, 2792790), (66495, 2773344), (67704, 2723820), (68640, 2686677), (70928, 2600010), (71610, 2575248), (72072, 2558740), (72540, 2542232), (74286, 2482480), (76384, 2414295), (78120, 2360644), (79794, 2311120), (80080, 2302866), (81840, 2253342), (82540, 2234232), (84630, 2179056), (85932, 2146040), (86667, 2127840), (88660, 2080008), (90090, 2046992), (90272, 2042865), (90794, 2031120), (93093, 1980960), (95480, 1931436), (96096, 1919055), (96720, 1906674), (98208, 1877785), (99048, 1861860), (101556, 1815880), (102960, 1791118), (104160, 1770483), (106392, 1733340), (107302, 1718640), (107415, 1716832), (110880, 1663181), (112840, 1634292), (114576, 1609530), (115556, 1595880), (116064, 1588895), (120120, 1535244), (122760, 1502228), (123810, 1489488), (124124, 1485720), (126945, 1452704), (127937, 1441440), (131040, 1407307), (132064, 1396395), (132990, 1386672), (135408, 1361910), (136191, 1354080), (141856, 1300005), (143220, 1287624), (144144, 1279370), (144445, 1276704), (145080, 1271116), (148572, 1241240), (155155, 1188576), (156240, 1180322), (159588, 1155560), (160160, 1151433), (160953, 1145760), (163680, 1126671), (165080, 1117116), (169260, 1089528), (171864, 1073020), (173334, 1063920), (177320, 1040004), (180180, 1023496), (181588, 1015560), (185715, 992992), (186186, 990480), (190960, 965718), (193440, 953337), (198096, 930930), (199485, 924448), (203112, 907940), (205920, 895559), (212784, 866670), (214604, 859320), (214830, 858416), (225680, 817146), (226985, 812448), (229152, 804765), (231112, 797940), (240240, 767622), (245520, 751114), (247620, 744744), (248248, 742860), (253890, 726352), (255874, 720720), (260001, 709280), (265980, 693336), (268255, 687456), (270816, 680955), (272382, 677040), (279279, 660320), (286440, 643812), (288288, 639685), (288890, 638352), (290160, 635558), (297144, 620620), (310310, 594288), (312480, 590161), (317779, 580320), (319176, 577780), (321906, 572880), (330160, 558558), (338520, 544764), (343728, 536510), (346668, 531960), (354640, 520002), (360360, 511748), (363176, 507780), (371430, 496496), (372372, 495240), (375557, 491040), (381920, 482859), (383811, 480480), (396192, 465465), (398970, 462224), (406224, 453970), (408573, 451360), (425568, 433335), (429208, 429660)]このpageの処理時間: 0.3360915184020996 seconds