21277360

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{499}}^1$

素因数の和:566

約数の個数: 80

約数和(自身を含む): 54684000

約数和(自身を除く): 33406640

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 41, 52, 65, 80, 82, 104, 130, 164, 205, 208, 260, 328, 410, 499, 520, 533, 656, 820, 998, 1040, 1066, 1640, 1996, 2132, 2495, 2665, 3280, 3992, 4264, 4990, 5330, 6487, 7984, 8528, 9980, 10660, 12974, 19960, 20459, 21320, 25948, 32435, 39920, 40918, 42640, 51896, 64870, 81836, 102295, 103792, 129740, 163672, 204590, 259480, 265967, 327344, 409180, 518960, 531934, 818360, 1063868, 1329835, 1636720, 2127736, 2659670, 4255472, 5319340, 10638680, 21277360]

約数ペア:

[(1, 21277360), (2, 10638680), (4, 5319340), (5, 4255472), (8, 2659670), (10, 2127736), (13, 1636720), (16, 1329835), (20, 1063868), (26, 818360), (40, 531934), (41, 518960), (52, 409180), (65, 327344), (80, 265967), (82, 259480), (104, 204590), (130, 163672), (164, 129740), (205, 103792), (208, 102295), (260, 81836), (328, 64870), (410, 51896), (499, 42640), (520, 40918), (533, 39920), (656, 32435), (820, 25948), (998, 21320), (1040, 20459), (1066, 19960), (1640, 12974), (1996, 10660), (2132, 9980), (2495, 8528), (2665, 7984), (3280, 6487), (3992, 5330), (4264, 4990)]