123157840

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{1499}}^1$

素因数の和:1604

約数の個数: 80

約数和(自身を含む): 312480000

約数和(自身を除く): 189322160

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 79, 80, 104, 130, 158, 208, 260, 316, 395, 520, 632, 790, 1027, 1040, 1264, 1499, 1580, 2054, 2998, 3160, 4108, 5135, 5996, 6320, 7495, 8216, 10270, 11992, 14990, 16432, 19487, 20540, 23984, 29980, 38974, 41080, 59960, 77948, 82160, 97435, 118421, 119920, 155896, 194870, 236842, 311792, 389740, 473684, 592105, 779480, 947368, 1184210, 1539473, 1558960, 1894736, 2368420, 3078946, 4736840, 6157892, 7697365, 9473680, 12315784, 15394730, 24631568, 30789460, 61578920, 123157840]

約数ペア:

[(1, 123157840), (2, 61578920), (4, 30789460), (5, 24631568), (8, 15394730), (10, 12315784), (13, 9473680), (16, 7697365), (20, 6157892), (26, 4736840), (40, 3078946), (52, 2368420), (65, 1894736), (79, 1558960), (80, 1539473), (104, 1184210), (130, 947368), (158, 779480), (208, 592105), (260, 473684), (316, 389740), (395, 311792), (520, 236842), (632, 194870), (790, 155896), (1027, 119920), (1040, 118421), (1264, 97435), (1499, 82160), (1580, 77948), (2054, 59960), (2998, 41080), (3160, 38974), (4108, 29980), (5135, 23984), (5996, 20540), (6320, 19487), (7495, 16432), (8216, 14990), (10270, 11992)]