20512019990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{457}}^1\times {\mathrm{821}}^1$

素因数の和:1374

約数の個数: 128

約数和(自身を含む): 46839638016

約数和(自身を除く): 26327618026

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 35, 55, 70, 71, 77, 110, 142, 154, 355, 385, 457, 497, 710, 770, 781, 821, 914, 994, 1562, 1642, 2285, 2485, 3199, 3905, 4105, 4570, 4970, 5027, 5467, 5747, 6398, 7810, 8210, 9031, 10054, 10934, 11494, 15995, 18062, 25135, 27335, 28735, 31990, 32447, 35189, 45155, 50270, 54670, 57470, 58291, 63217, 64894, 70378, 90310, 116582, 126434, 162235, 175945, 227129, 291455, 316085, 324470, 351890, 356917, 375197, 408037, 454258, 582910, 632170, 641201, 713834, 750394, 816074, 1135645, 1282402, 1784585, 1875985, 2040185, 2271290, 2498419, 2626379, 3206005, 3569170, 3751970, 4080370, 4127167, 4488407, 4996838, 5252758, 6412010, 8254334, 8976814, 12492095, 13131895, 20635835, 22442035, 24984190, 26263790, 26638987, 28890169, 41271670, 44884070, 53277974, 57780338, 133194935, 144450845, 186472909, 266389870, 288901690, 293028857, 372945818, 586057714, 932364545, 1465144285, 1864729090, 2051201999, 2930288570, 4102403998, 10256009995, 20512019990]

約数ペア:

[(1, 20512019990), (2, 10256009995), (5, 4102403998), (7, 2930288570), (10, 2051201999), (11, 1864729090), (14, 1465144285), (22, 932364545), (35, 586057714), (55, 372945818), (70, 293028857), (71, 288901690), (77, 266389870), (110, 186472909), (142, 144450845), (154, 133194935), (355, 57780338), (385, 53277974), (457, 44884070), (497, 41271670), (710, 28890169), (770, 26638987), (781, 26263790), (821, 24984190), (914, 22442035), (994, 20635835), (1562, 13131895), (1642, 12492095), (2285, 8976814), (2485, 8254334), (3199, 6412010), (3905, 5252758), (4105, 4996838), (4570, 4488407), (4970, 4127167), (5027, 4080370), (5467, 3751970), (5747, 3569170), (6398, 3206005), (7810, 2626379), (8210, 2498419), (9031, 2271290), (10054, 2040185), (10934, 1875985), (11494, 1784585), (15995, 1282402), (18062, 1135645), (25135, 816074), (27335, 750394), (28735, 713834), (31990, 641201), (32447, 632170), (35189, 582910), (45155, 454258), (50270, 408037), (54670, 375197), (57470, 356917), (58291, 351890), (63217, 324470), (64894, 316085), (70378, 291455), (90310, 227129), (116582, 175945), (126434, 162235)]