661499020

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{379}}^1$

素因数の和:552

約数の個数: 144

約数和(自身を含む): 1757579040

約数和(自身を除く): 1096080020

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 49, 52, 65, 70, 91, 98, 130, 137, 140, 182, 196, 245, 260, 274, 364, 379, 455, 490, 548, 637, 685, 758, 910, 959, 980, 1274, 1370, 1516, 1781, 1820, 1895, 1918, 2548, 2653, 2740, 3185, 3562, 3790, 3836, 4795, 4927, 5306, 6370, 6713, 7124, 7580, 8905, 9590, 9854, 10612, 12467, 12740, 13265, 13426, 17810, 18571, 19180, 19708, 24635, 24934, 26530, 26852, 33565, 34489, 35620, 37142, 49270, 49868, 51923, 53060, 62335, 67130, 68978, 74284, 87269, 92855, 98540, 103846, 124670, 134260, 137956, 172445, 174538, 185710, 207692, 241423, 249340, 259615, 344890, 349076, 363461, 371420, 436345, 482846, 519230, 674999, 689780, 726922, 872690, 965692, 1038460, 1207115, 1349998, 1453844, 1745380, 1817305, 2414230, 2544227, 2699996, 3374995, 3634610, 4724993, 4828460, 5088454, 6749990, 7269220, 9449986, 10176908, 12721135, 13499980, 18899972, 23624965, 25442270, 33074951, 47249930, 50884540, 66149902, 94499860, 132299804, 165374755, 330749510, 661499020]

約数ペア:

[(1, 661499020), (2, 330749510), (4, 165374755), (5, 132299804), (7, 94499860), (10, 66149902), (13, 50884540), (14, 47249930), (20, 33074951), (26, 25442270), (28, 23624965), (35, 18899972), (49, 13499980), (52, 12721135), (65, 10176908), (70, 9449986), (91, 7269220), (98, 6749990), (130, 5088454), (137, 4828460), (140, 4724993), (182, 3634610), (196, 3374995), (245, 2699996), (260, 2544227), (274, 2414230), (364, 1817305), (379, 1745380), (455, 1453844), (490, 1349998), (548, 1207115), (637, 1038460), (685, 965692), (758, 872690), (910, 726922), (959, 689780), (980, 674999), (1274, 519230), (1370, 482846), (1516, 436345), (1781, 371420), (1820, 363461), (1895, 349076), (1918, 344890), (2548, 259615), (2653, 249340), (2740, 241423), (3185, 207692), (3562, 185710), (3790, 174538), (3836, 172445), (4795, 137956), (4927, 134260), (5306, 124670), (6370, 103846), (6713, 98540), (7124, 92855), (7580, 87269), (8905, 74284), (9590, 68978), (9854, 67130), (10612, 62335), (12467, 53060), (12740, 51923), (13265, 49868), (13426, 49270), (17810, 37142), (18571, 35620), (19180, 34489), (19708, 33565), (24635, 26852), (24934, 26530)]