About the Number

129765716640

129765716639 ← → 129765716641

2進数表記:1111000110110101000111011001010100000

漢数字表記:千二百九十七億六千五百七十一万六千六百四十

素因数分解:

2 5 × 3 2 × 5 1 × 7 1 × 19 1 × 23 1 × 89 1 × 331 1

素因数の和:490
約数の個数: 1152
約数和(自身を含む): 563828428800
約数和(自身を除く): 434062712160

約数列:
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 19, 20, 21, 23, 24, 28, 30, 32, 35, 36, 38, 40, 42, 45, 46, 48, 56, 57, 60, 63, 69, 70, 72, 76, 80, 84, 89, 90, 92, 95, 96, 105, 112, 114, 115, 120, 126, 133, 138, 140, 144, 152, 160, 161, 168, 171, 178, 180, 184, 190, 207, 210, 224, 228, 230, 240, 252, 266, 267, 276, 280, 285, 288, 304, 315, 322, 331, 336, 342, 345, 356, 360, 368, 380, 399, 414, 420, 437, 445, 456, 460, 480, 483, 504, 532, 534, 552, 560, 570, 608, 623, 630, 644, 662, 665, 672, 684, 690, 712, 720, 736, 760, 798, 801, 805, 828, 840, 855, 874, 890, 912, 920, 966, 993, 1008, 1035, 1064, 1068, 1104, 1120, 1140, 1197, 1246, 1260, 1288, 1311, 1324, 1330, 1335, 1368, 1380, 1424, 1440, 1449, 1520, 1596, 1602, 1610, 1655, 1656, 1680, 1691, 1710, 1748, 1780, 1824, 1840, 1869, 1932, 1986, 1995, 2016, 2047, 2070, 2128, 2136, 2185, 2208, 2280, 2317, 2394, 2415, 2492, 2520, 2576, 2622, 2648, 2660, 2670, 2736, 2760, 2848, 2898, 2979, 3040, 3059, 3115, 3192, 3204, 3220, 3310, 3312, 3360, 3382, 3420, 3496, 3560, 3680, 3738, 3864, 3933, 3972, 3990, 4005, 4094, 4140, 4256, 4272, 4370, 4560, 4634, 4788, 4830, 4965, 4984, 5040, 5073, 5152, 5244, 5296, 5320, 5340, 5472, 5520, 5607, 5796, 5958, 5985, 6118, 6141, 6230, 6289, 6384, 6408, 6440, 6555, 6620, 6624, 6764, 6840, 6951, 6992, 7120, 7245, 7476, 7613, 7728, 7866, 7944, 7980, 8010, 8188, 8280, 8455, 8544, 8740, 9120, 9177, 9268, 9345, 9576, 9660, 9930, 9968, 10080, 10146, 10235, 10488, 10592, 10640, 10680, 11040, 11214, 11585, 11592, 11837, 11916, 11970, 12236, 12282, 12460, 12578, 12768, 12816, 12880, 13110, 13240, 13528, 13680, 13902, 13984, 14240, 14329, 14490, 14895, 14952, 15219, 15226, 15295, 15456, 15732, 15888, 15960, 16020, 16376, 16560, 16910, 17480, 18354, 18423, 18536, 18690, 18867, 19152, 19320, 19665, 19860, 19936, 20292, 20470, 20853, 20976, 21280, 21360, 22428, 22839, 23170, 23184, 23674, 23832, 23940, 24472, 24564, 24920, 25156, 25365, 25632, 25760, 26220, 26480, 27056, 27360, 27531, 27804, 28035, 28658, 28980, 29459, 29790, 29904, 30438, 30452, 30590, 30705, 31445, 31464, 31776, 31920, 32040, 32752, 33120, 33820, 34755, 34960, 35511, 36708, 36846, 37072, 37380, 37734, 38065, 38304, 38640, 38893, 39330, 39720, 40584, 40940, 41706, 41952, 42720, 42987, 44023, 44856, 45678, 45885, 46340, 46368, 47348, 47664, 47880, 48944, 49128, 49840, 50312, 50730, 52440, 52960, 53291, 54112, 55062, 55608, 56070, 56601, 57316, 57960, 58918, 59185, 59580, 59808, 60876, 60904, 61180, 61410, 62890, 62928, 63840, 64080, 65504, 67640, 68517, 69510, 69920, 71022, 71645, 73416, 73692, 74144, 74760, 75468, 76095, 76130, 77280, 77786, 78660, 79440, 81168, 81880, 83412, 85974, 88046, 88377, 89712, 91356, 91770, 92115, 92680, 94335, 94696, 95328, 95760, 97888, 98256, 99680, 100624, 101460, 104265, 104880, 106533, 106582, 110124, 111216, 112140, 113202, 114195, 114632, 115920, 116679, 117836, 118370, 119160, 121752, 121808, 122360, 122820, 125780, 125856, 128160, 128961, 132069, 135280, 137034, 137655, 139020, 142044, 143290, 144647, 146832, 147295, 147384, 149520, 150936, 152190, 152260, 155572, 157320, 158880, 159873, 162336, 163760, 166824, 171948, 176092, 176754, 177555, 179424, 182712, 183540, 184230, 185360, 188670, 189392, 191520, 194465, 196512, 201248, 202920, 206213, 208530, 209760, 213066, 213164, 214935, 220115, 220248, 222432, 224280, 226404, 228390, 229264, 231840, 233358, 235672, 236740, 238320, 243504, 243616, 244720, 245640, 251560, 257922, 264138, 265131, 266455, 270560, 272251, 274068, 275310, 278040, 283005, 284088, 286580, 289294, 293664, 294590, 294768, 299040, 301872, 304380, 304520, 311144, 314640, 319746, 327520, 333648, 342585, 343896, 350037, 352184, 353508, 355110, 365424, 367080, 368460, 370720, 377340, 378784, 388930, 396207, 405840, 412426, 417060, 426132, 426328, 429870, 433941, 440230, 440496, 441885, 448560, 452808, 456780, 458528, 466716, 471344, 473480, 476640, 479619, 487008, 489440, 491280, 503120, 515844, 528276, 530262, 532665, 532910, 544502, 548136, 550620, 556080, 559721, 566010, 568176, 573160, 578588, 583395, 589180, 589536, 603744, 608760, 609040, 618639, 622288, 629280, 639492, 644805, 660345, 667296, 677557, 685170, 687792, 700074, 704368, 707016, 710220, 723235, 730848, 734160, 736920, 754680, 777860, 792414, 799365, 811680, 816753, 824852, 834120, 852264, 852656, 859740, 867882, 880460, 880992, 883770, 897120, 905616, 913560, 933432, 942688, 946960, 959238, 982560, 1006240, 1012529, 1031065, 1031688, 1056552, 1060524, 1065330, 1065820, 1089004, 1096272, 1101240, 1112160, 1119442, 1132020, 1136352, 1146320, 1157176, 1166790, 1178360, 1217520, 1218080, 1237278, 1244576, 1278984, 1289610, 1301823, 1320690, 1325655, 1355114, 1361255, 1370340, 1375584, 1400148, 1408736, 1414032, 1420440, 1446470, 1468320, 1473840, 1509360, 1555720, 1584828, 1598730, 1633506, 1649704, 1668240, 1679163, 1704528, 1705312, 1719480, 1735764, 1750185, 1760920, 1767540, 1811232, 1827120, 1855917, 1866864, 1893920, 1918476, 1981035, 2025058, 2032671, 2062130, 2063376, 2113104, 2121048, 2130660, 2131640, 2169705, 2178008, 2192544, 2202480, 2238884, 2264040, 2292640, 2314352, 2333580, 2356720, 2398095, 2435040, 2450259, 2474556, 2557968, 2579220, 2603646, 2641380, 2651310, 2710228, 2722510, 2740680, 2798605, 2800296, 2828064, 2840880, 2892940, 2947680, 3018720, 3037587, 3093195, 3111440, 3169656, 3197460, 3267012, 3299408, 3336480, 3358326, 3387785, 3409056, 3438960, 3471528, 3500370, 3521840, 3535080, 3654240, 3711834, 3733728, 3836952, 3918047, 3962070, 4050116, 4065342, 4083765, 4124260, 4126752, 4226208, 4242096, 4261320, 4263280, 4339410, 4356016, 4404960, 4477768, 4528080, 4628704, 4667160, 4713440, 4742899, 4796190, 4900518, 4949112, 5037489, 5062645, 5115936, 5158440, 5207292, 5282760, 5302620, 5420456, 5445020, 5481360, 5597210, 5600592, 5681760, 5785880, 6075174, 6098013, 6186390, 6222880, 6339312, 6394920, 6509115, 6534024, 6598816, 6716652, 6775570, 6877920, 6943056, 7000740, 7043680, 7070160, 7423668, 7673904, 7836094, 7924140, 8100232, 8130684, 8167530, 8248520, 8395815, 8484192, 8522640, 8526560, 8678820, 8712032, 8955536, 9056160, 9112761, 9279585, 9334320, 9485798, 9592380, 9801036, 9898224, 10074978, 10125290, 10163355, 10316880, 10414584, 10565520, 10605240, 10840912, 10890040, 10962720, 11194420, 11201184, 11571760, 11754141, 12150348, 12196026, 12251295, 12372780, 12678624, 12789840, 12873583, 13018230, 13068048, 13433304, 13551140, 13886112, 14001480, 14140320, 14228697, 14847336, 15187935, 15347808, 15672188, 15848280, 16200464, 16261368, 16335060, 16497040, 16791630, 17045280, 17357640, 17911072, 18225522, 18559170, 18668640, 18971596, 19184760, 19590235, 19602072, 19796448, 20149956, 20250580, 20326710, 20633760, 20829168, 21131040, 21210480, 21681824, 21780080, 22388840, 23143520, 23508282, 23714495, 24300696, 24392052, 24502590, 24745560, 25187445, 25579680, 25747166, 26036460, 26136096, 26866608, 27102280, 28002960, 28457394, 29694672, 30375870, 30490065, 31344376, 31696560, 32400928, 32522736, 32670120, 32994080, 33583260, 34715280, 35262423, 36451044, 37118340, 37943192, 38369520, 38620749, 39180470, 39204144, 40299912, 40501160, 40653420, 41658336, 42420960, 42686091, 43560160, 44777680, 45563805, 47016564, 47428990, 48601392, 48784104, 49005180, 49491120, 50374890, 51494332, 52072920, 53733216, 54204560, 56005920, 56914788, 58770705, 59389344, 60751740, 60980130, 62688752, 63393120, 64367915, 65045472, 65340240, 67166520, 69430560, 70524846, 71143485, 72902088, 74236680, 75886384, 76739040, 77241498, 78360940, 78408288, 80599824, 81002320, 81306840, 85372182, 89555360, 90115081, 91127610, 94033128, 94857980, 97202784, 97568208, 98010360, 98982240, 100749780, 102988664, 104145840, 108409120, 113829576, 115862247, 117541410, 121503480, 121960260, 125377504, 128735830, 130680480, 134333040, 141049692, 142286970, 145804176, 148473360, 151772768, 154482996, 156721880, 161199648, 162004640, 162613680, 170744364, 176312115, 180230162, 182255220, 188066256, 189715960, 193103745, 195136416, 196020720, 201499560, 205977328, 208291680, 213430455, 227659152, 231724494, 235082820, 243006960, 243920520, 257471660, 268666080, 270345243, 282099384, 284573940, 291608352, 296946720, 308965992, 313443760, 325227360, 341488728, 352624230, 360460324, 364510440, 376132512, 379431920, 386207490, 392041440, 402999120, 411954656, 426860910, 450575405, 455318304, 463448988, 470165640, 486013920, 487841040, 514943320, 540690486, 564198768, 569147880, 579311235, 617931984, 626887520, 682977456, 705248460, 720920648, 729020880, 758863840, 772414980, 805998240, 811035729, 853721820, 901150810, 926897976, 940331280, 975682080, 1029886640, 1081380972, 1128397536, 1138295760, 1158622470, 1235863968, 1351726215, 1365954912, 1410496920, 1441841296, 1458041760, 1544829960, 1622071458, 1707443640, 1802301620, 1853795952, 1880662560, 2059773280, 2162761944, 2276591520, 2317244940, 2703452430, 2820993840, 2883682592, 3089659920, 3244142916, 3414887280, 3604603240, 3707591904, 4055178645, 4325523888, 4634489880, 5406904860, 5641987680, 6179319840, 6488285832, 6829774560, 7209206480, 8110357290, 8651047776, 9268979760, 10813809720, 12976571664, 14418412960, 16220714580, 18537959520, 21627619440, 25953143328, 32441429160, 43255238880, 64882858320, 129765716640]

約数ペア:
[(1, 129765716640), (2, 64882858320), (3, 43255238880), (4, 32441429160), (5, 25953143328), (6, 21627619440), (7, 18537959520), (8, 16220714580), (9, 14418412960), (10, 12976571664), (12, 10813809720), (14, 9268979760), (15, 8651047776), (16, 8110357290), (18, 7209206480), (19, 6829774560), (20, 6488285832), (21, 6179319840), (23, 5641987680), (24, 5406904860), (28, 4634489880), (30, 4325523888), (32, 4055178645), (35, 3707591904), (36, 3604603240), (38, 3414887280), (40, 3244142916), (42, 3089659920), (45, 2883682592), (46, 2820993840), (48, 2703452430), (56, 2317244940), (57, 2276591520), (60, 2162761944), (63, 2059773280), (69, 1880662560), (70, 1853795952), (72, 1802301620), (76, 1707443640), (80, 1622071458), (84, 1544829960), (89, 1458041760), (90, 1441841296), (92, 1410496920), (95, 1365954912), (96, 1351726215), (105, 1235863968), (112, 1158622470), (114, 1138295760), (115, 1128397536), (120, 1081380972), (126, 1029886640), (133, 975682080), (138, 940331280), (140, 926897976), (144, 901150810), (152, 853721820), (160, 811035729), (161, 805998240), (168, 772414980), (171, 758863840), (178, 729020880), (180, 720920648), (184, 705248460), (190, 682977456), (207, 626887520), (210, 617931984), (224, 579311235), (228, 569147880), (230, 564198768), (240, 540690486), (252, 514943320), (266, 487841040), (267, 486013920), (276, 470165640), (280, 463448988), (285, 455318304), (288, 450575405), (304, 426860910), (315, 411954656), (322, 402999120), (331, 392041440), (336, 386207490), (342, 379431920), (345, 376132512), (356, 364510440), (360, 360460324), (368, 352624230), (380, 341488728), (399, 325227360), (414, 313443760), (420, 308965992), (437, 296946720), (445, 291608352), (456, 284573940), (460, 282099384), (480, 270345243), (483, 268666080), (504, 257471660), (532, 243920520), (534, 243006960), (552, 235082820), (560, 231724494), (570, 227659152), (608, 213430455), (623, 208291680), (630, 205977328), (644, 201499560), (662, 196020720), (665, 195136416), (672, 193103745), (684, 189715960), (690, 188066256), (712, 182255220), (720, 180230162), (736, 176312115), (760, 170744364), (798, 162613680), (801, 162004640), (805, 161199648), (828, 156721880), (840, 154482996), (855, 151772768), (874, 148473360), (890, 145804176), (912, 142286970), (920, 141049692), (966, 134333040), (993, 130680480), (1008, 128735830), (1035, 125377504), (1064, 121960260), (1068, 121503480), (1104, 117541410), (1120, 115862247), (1140, 113829576), (1197, 108409120), (1246, 104145840), (1260, 102988664), (1288, 100749780), (1311, 98982240), (1324, 98010360), (1330, 97568208), (1335, 97202784), (1368, 94857980), (1380, 94033128), (1424, 91127610), (1440, 90115081), (1449, 89555360), (1520, 85372182), (1596, 81306840), (1602, 81002320), (1610, 80599824), (1655, 78408288), (1656, 78360940), (1680, 77241498), (1691, 76739040), (1710, 75886384), (1748, 74236680), (1780, 72902088), (1824, 71143485), (1840, 70524846), (1869, 69430560), (1932, 67166520), (1986, 65340240), (1995, 65045472), (2016, 64367915), (2047, 63393120), (2070, 62688752), (2128, 60980130), (2136, 60751740), (2185, 59389344), (2208, 58770705), (2280, 56914788), (2317, 56005920), (2394, 54204560), (2415, 53733216), (2492, 52072920), (2520, 51494332), (2576, 50374890), (2622, 49491120), (2648, 49005180), (2660, 48784104), (2670, 48601392), (2736, 47428990), (2760, 47016564), (2848, 45563805), (2898, 44777680), (2979, 43560160), (3040, 42686091), (3059, 42420960), (3115, 41658336), (3192, 40653420), (3204, 40501160), (3220, 40299912), (3310, 39204144), (3312, 39180470), (3360, 38620749), (3382, 38369520), (3420, 37943192), (3496, 37118340), (3560, 36451044), (3680, 35262423), (3738, 34715280), (3864, 33583260), (3933, 32994080), (3972, 32670120), (3990, 32522736), (4005, 32400928), (4094, 31696560), (4140, 31344376), (4256, 30490065), (4272, 30375870), (4370, 29694672), (4560, 28457394), (4634, 28002960), (4788, 27102280), (4830, 26866608), (4965, 26136096), (4984, 26036460), (5040, 25747166), (5073, 25579680), (5152, 25187445), (5244, 24745560), (5296, 24502590), (5320, 24392052), (5340, 24300696), (5472, 23714495), (5520, 23508282), (5607, 23143520), (5796, 22388840), (5958, 21780080), (5985, 21681824), (6118, 21210480), (6141, 21131040), (6230, 20829168), (6289, 20633760), (6384, 20326710), (6408, 20250580), (6440, 20149956), (6555, 19796448), (6620, 19602072), (6624, 19590235), (6764, 19184760), (6840, 18971596), (6951, 18668640), (6992, 18559170), (7120, 18225522), (7245, 17911072), (7476, 17357640), (7613, 17045280), (7728, 16791630), (7866, 16497040), (7944, 16335060), (7980, 16261368), (8010, 16200464), (8188, 15848280), (8280, 15672188), (8455, 15347808), (8544, 15187935), (8740, 14847336), (9120, 14228697), (9177, 14140320), (9268, 14001480), (9345, 13886112), (9576, 13551140), (9660, 13433304), (9930, 13068048), (9968, 13018230), (10080, 12873583), (10146, 12789840), (10235, 12678624), (10488, 12372780), (10592, 12251295), (10640, 12196026), (10680, 12150348), (11040, 11754141), (11214, 11571760), (11585, 11201184), (11592, 11194420), (11837, 10962720), (11916, 10890040), (11970, 10840912), (12236, 10605240), (12282, 10565520), (12460, 10414584), (12578, 10316880), (12768, 10163355), (12816, 10125290), (12880, 10074978), (13110, 9898224), (13240, 9801036), (13528, 9592380), (13680, 9485798), (13902, 9334320), (13984, 9279585), (14240, 9112761), (14329, 9056160), (14490, 8955536), (14895, 8712032), (14952, 8678820), (15219, 8526560), (15226, 8522640), (15295, 8484192), (15456, 8395815), (15732, 8248520), (15888, 8167530), (15960, 8130684), (16020, 8100232), (16376, 7924140), (16560, 7836094), (16910, 7673904), (17480, 7423668), (18354, 7070160), (18423, 7043680), (18536, 7000740), (18690, 6943056), (18867, 6877920), (19152, 6775570), (19320, 6716652), (19665, 6598816), (19860, 6534024), (19936, 6509115), (20292, 6394920), (20470, 6339312), (20853, 6222880), (20976, 6186390), (21280, 6098013), (21360, 6075174), (22428, 5785880), (22839, 5681760), (23170, 5600592), (23184, 5597210), (23674, 5481360), (23832, 5445020), (23940, 5420456), (24472, 5302620), (24564, 5282760), (24920, 5207292), (25156, 5158440), (25365, 5115936), (25632, 5062645), (25760, 5037489), (26220, 4949112), (26480, 4900518), (27056, 4796190), (27360, 4742899), (27531, 4713440), (27804, 4667160), (28035, 4628704), (28658, 4528080), (28980, 4477768), (29459, 4404960), (29790, 4356016), (29904, 4339410), (30438, 4263280), (30452, 4261320), (30590, 4242096), (30705, 4226208), (31445, 4126752), (31464, 4124260), (31776, 4083765), (31920, 4065342), (32040, 4050116), (32752, 3962070), (33120, 3918047), (33820, 3836952), (34755, 3733728), (34960, 3711834), (35511, 3654240), (36708, 3535080), (36846, 3521840), (37072, 3500370), (37380, 3471528), (37734, 3438960), (38065, 3409056), (38304, 3387785), (38640, 3358326), (38893, 3336480), (39330, 3299408), (39720, 3267012), (40584, 3197460), (40940, 3169656), (41706, 3111440), (41952, 3093195), (42720, 3037587), (42987, 3018720), (44023, 2947680), (44856, 2892940), (45678, 2840880), (45885, 2828064), (46340, 2800296), (46368, 2798605), (47348, 2740680), (47664, 2722510), (47880, 2710228), (48944, 2651310), (49128, 2641380), (49840, 2603646), (50312, 2579220), (50730, 2557968), (52440, 2474556), (52960, 2450259), (53291, 2435040), (54112, 2398095), (55062, 2356720), (55608, 2333580), (56070, 2314352), (56601, 2292640), (57316, 2264040), (57960, 2238884), (58918, 2202480), (59185, 2192544), (59580, 2178008), (59808, 2169705), (60876, 2131640), (60904, 2130660), (61180, 2121048), (61410, 2113104), (62890, 2063376), (62928, 2062130), (63840, 2032671), (64080, 2025058), (65504, 1981035), (67640, 1918476), (68517, 1893920), (69510, 1866864), (69920, 1855917), (71022, 1827120), (71645, 1811232), (73416, 1767540), (73692, 1760920), (74144, 1750185), (74760, 1735764), (75468, 1719480), (76095, 1705312), (76130, 1704528), (77280, 1679163), (77786, 1668240), (78660, 1649704), (79440, 1633506), (81168, 1598730), (81880, 1584828), (83412, 1555720), (85974, 1509360), (88046, 1473840), (88377, 1468320), (89712, 1446470), (91356, 1420440), (91770, 1414032), (92115, 1408736), (92680, 1400148), (94335, 1375584), (94696, 1370340), (95328, 1361255), (95760, 1355114), (97888, 1325655), (98256, 1320690), (99680, 1301823), (100624, 1289610), (101460, 1278984), (104265, 1244576), (104880, 1237278), (106533, 1218080), (106582, 1217520), (110124, 1178360), (111216, 1166790), (112140, 1157176), (113202, 1146320), (114195, 1136352), (114632, 1132020), (115920, 1119442), (116679, 1112160), (117836, 1101240), (118370, 1096272), (119160, 1089004), (121752, 1065820), (121808, 1065330), (122360, 1060524), (122820, 1056552), (125780, 1031688), (125856, 1031065), (128160, 1012529), (128961, 1006240), (132069, 982560), (135280, 959238), (137034, 946960), (137655, 942688), (139020, 933432), (142044, 913560), (143290, 905616), (144647, 897120), (146832, 883770), (147295, 880992), (147384, 880460), (149520, 867882), (150936, 859740), (152190, 852656), (152260, 852264), (155572, 834120), (157320, 824852), (158880, 816753), (159873, 811680), (162336, 799365), (163760, 792414), (166824, 777860), (171948, 754680), (176092, 736920), (176754, 734160), (177555, 730848), (179424, 723235), (182712, 710220), (183540, 707016), (184230, 704368), (185360, 700074), (188670, 687792), (189392, 685170), (191520, 677557), (194465, 667296), (196512, 660345), (201248, 644805), (202920, 639492), (206213, 629280), (208530, 622288), (209760, 618639), (213066, 609040), (213164, 608760), (214935, 603744), (220115, 589536), (220248, 589180), (222432, 583395), (224280, 578588), (226404, 573160), (228390, 568176), (229264, 566010), (231840, 559721), (233358, 556080), (235672, 550620), (236740, 548136), (238320, 544502), (243504, 532910), (243616, 532665), (244720, 530262), (245640, 528276), (251560, 515844), (257922, 503120), (264138, 491280), (265131, 489440), (266455, 487008), (270560, 479619), (272251, 476640), (274068, 473480), (275310, 471344), (278040, 466716), (283005, 458528), (284088, 456780), (286580, 452808), (289294, 448560), (293664, 441885), (294590, 440496), (294768, 440230), (299040, 433941), (301872, 429870), (304380, 426328), (304520, 426132), (311144, 417060), (314640, 412426), (319746, 405840), (327520, 396207), (333648, 388930), (342585, 378784), (343896, 377340), (350037, 370720), (352184, 368460), (353508, 367080), (355110, 365424)]

このpageの処理時間: 0.5164332389831543 seconds