400800400

素因数分解:

$2^4\times 5^2\times 7^2\times {\mathrm{11}}^2\times {\mathrm{13}}^2$

素因数の和:80

約数の個数: 405

約数和(自身を含む): 1333217403

約数和(自身を除く): 932417003

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 16, 20, 22, 25, 26, 28, 35, 40, 44, 49, 50, 52, 55, 56, 65, 70, 77, 80, 88, 91, 98, 100, 104, 110, 112, 121, 130, 140, 143, 154, 169, 175, 176, 182, 196, 200, 208, 220, 242, 245, 260, 275, 280, 286, 308, 325, 338, 350, 364, 385, 392, 400, 440, 455, 484, 490, 520, 539, 550, 560, 572, 605, 616, 637, 650, 676, 700, 715, 728, 770, 784, 845, 847, 880, 910, 968, 980, 1001, 1040, 1078, 1100, 1144, 1183, 1210, 1225, 1232, 1274, 1300, 1352, 1400, 1430, 1456, 1540, 1573, 1690, 1694, 1820, 1859, 1925, 1936, 1960, 2002, 2156, 2200, 2275, 2288, 2366, 2420, 2450, 2548, 2600, 2695, 2704, 2800, 2860, 3025, 3080, 3146, 3185, 3380, 3388, 3575, 3640, 3718, 3850, 3920, 4004, 4225, 4235, 4312, 4400, 4550, 4732, 4840, 4900, 5005, 5096, 5200, 5390, 5720, 5915, 5929, 6050, 6160, 6292, 6370, 6760, 6776, 7007, 7150, 7280, 7436, 7700, 7865, 8008, 8281, 8450, 8470, 8624, 9100, 9295, 9464, 9680, 9800, 10010, 10192, 10780, 11011, 11440, 11830, 11858, 12100, 12584, 12740, 13013, 13475, 13520, 13552, 14014, 14300, 14872, 15400, 15730, 15925, 16016, 16562, 16900, 16940, 18200, 18590, 18928, 19600, 20020, 20449, 21175, 21560, 22022, 23660, 23716, 24200, 25025, 25168, 25480, 26026, 26950, 28028, 28600, 29575, 29645, 29744, 30800, 31460, 31850, 33124, 33800, 33880, 35035, 36400, 37180, 39325, 40040, 40898, 41405, 42350, 43120, 44044, 46475, 47320, 47432, 48400, 50050, 50960, 52052, 53900, 55055, 56056, 57200, 59150, 59290, 62920, 63700, 65065, 66248, 67600, 67760, 70070, 74360, 77077, 78650, 80080, 81796, 82810, 84700, 88088, 91091, 92950, 94640, 94864, 100100, 102245, 104104, 107800, 110110, 112112, 118300, 118580, 125840, 127400, 130130, 132496, 140140, 143143, 148225, 148720, 154154, 157300, 163592, 165620, 169400, 175175, 176176, 182182, 185900, 200200, 204490, 207025, 208208, 215600, 220220, 236600, 237160, 254800, 260260, 275275, 280280, 286286, 296450, 308308, 314600, 325325, 327184, 331240, 338800, 350350, 364364, 371800, 385385, 400400, 408980, 414050, 440440, 455455, 473200, 474320, 511225, 520520, 550550, 560560, 572572, 592900, 616616, 629200, 650650, 662480, 700700, 715715, 728728, 743600, 770770, 817960, 828100, 880880, 910910, 1002001, 1022450, 1041040, 1101100, 1145144, 1185800, 1233232, 1301300, 1401400, 1431430, 1457456, 1541540, 1635920, 1656200, 1821820, 1926925, 2004002, 2044900, 2202200, 2277275, 2290288, 2371600, 2602600, 2802800, 2862860, 3083080, 3312400, 3578575, 3643640, 3853850, 4008004, 4089800, 4404400, 4554550, 5010005, 5205200, 5725720, 6166160, 7157150, 7287280, 7707700, 8016008, 8179600, 9109100, 10020010, 11451440, 14314300, 15415400, 16032016, 18218200, 20040020, 25050025, 28628600, 30830800, 36436400, 40080040, 50100050, 57257200, 80160080, 100200100, 200400200, 400800400]

約数ペア:

[(1, 400800400), (2, 200400200), (4, 100200100), (5, 80160080), (7, 57257200), (8, 50100050), (10, 40080040), (11, 36436400), (13, 30830800), (14, 28628600), (16, 25050025), (20, 20040020), (22, 18218200), (25, 16032016), (26, 15415400), (28, 14314300), (35, 11451440), (40, 10020010), (44, 9109100), (49, 8179600), (50, 8016008), (52, 7707700), (55, 7287280), (56, 7157150), (65, 6166160), (70, 5725720), (77, 5205200), (80, 5010005), (88, 4554550), (91, 4404400), (98, 4089800), (100, 4008004), (104, 3853850), (110, 3643640), (112, 3578575), (121, 3312400), (130, 3083080), (140, 2862860), (143, 2802800), (154, 2602600), (169, 2371600), (175, 2290288), (176, 2277275), (182, 2202200), (196, 2044900), (200, 2004002), (208, 1926925), (220, 1821820), (242, 1656200), (245, 1635920), (260, 1541540), (275, 1457456), (280, 1431430), (286, 1401400), (308, 1301300), (325, 1233232), (338, 1185800), (350, 1145144), (364, 1101100), (385, 1041040), (392, 1022450), (400, 1002001), (440, 910910), (455, 880880), (484, 828100), (490, 817960), (520, 770770), (539, 743600), (550, 728728), (560, 715715), (572, 700700), (605, 662480), (616, 650650), (637, 629200), (650, 616616), (676, 592900), (700, 572572), (715, 560560), (728, 550550), (770, 520520), (784, 511225), (845, 474320), (847, 473200), (880, 455455), (910, 440440), (968, 414050), (980, 408980), (1001, 400400), (1040, 385385), (1078, 371800), (1100, 364364), (1144, 350350), (1183, 338800), (1210, 331240), (1225, 327184), (1232, 325325), (1274, 314600), (1300, 308308), (1352, 296450), (1400, 286286), (1430, 280280), (1456, 275275), (1540, 260260), (1573, 254800), (1690, 237160), (1694, 236600), (1820, 220220), (1859, 215600), (1925, 208208), (1936, 207025), (1960, 204490), (2002, 200200), (2156, 185900), (2200, 182182), (2275, 176176), (2288, 175175), (2366, 169400), (2420, 165620), (2450, 163592), (2548, 157300), (2600, 154154), (2695, 148720), (2704, 148225), (2800, 143143), (2860, 140140), (3025, 132496), (3080, 130130), (3146, 127400), (3185, 125840), (3380, 118580), (3388, 118300), (3575, 112112), (3640, 110110), (3718, 107800), (3850, 104104), (3920, 102245), (4004, 100100), (4225, 94864), (4235, 94640), (4312, 92950), (4400, 91091), (4550, 88088), (4732, 84700), (4840, 82810), (4900, 81796), (5005, 80080), (5096, 78650), (5200, 77077), (5390, 74360), (5720, 70070), (5915, 67760), (5929, 67600), (6050, 66248), (6160, 65065), (6292, 63700), (6370, 62920), (6760, 59290), (6776, 59150), (7007, 57200), (7150, 56056), (7280, 55055), (7436, 53900), (7700, 52052), (7865, 50960), (8008, 50050), (8281, 48400), (8450, 47432), (8470, 47320), (8624, 46475), (9100, 44044), (9295, 43120), (9464, 42350), (9680, 41405), (9800, 40898), (10010, 40040), (10192, 39325), (10780, 37180), (11011, 36400), (11440, 35035), (11830, 33880), (11858, 33800), (12100, 33124), (12584, 31850), (12740, 31460), (13013, 30800), (13475, 29744), (13520, 29645), (13552, 29575), (14014, 28600), (14300, 28028), (14872, 26950), (15400, 26026), (15730, 25480), (15925, 25168), (16016, 25025), (16562, 24200), (16900, 23716), (16940, 23660), (18200, 22022), (18590, 21560), (18928, 21175), (19600, 20449)]