18444920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{449}}^1$

素因数の和:552

約数の個数: 64

約数和(自身を含む): 45360000

約数和(自身を除く): 26915080

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 79, 104, 130, 158, 260, 316, 395, 449, 520, 632, 790, 898, 1027, 1580, 1796, 2054, 2245, 3160, 3592, 4108, 4490, 5135, 5837, 8216, 8980, 10270, 11674, 17960, 20540, 23348, 29185, 35471, 41080, 46696, 58370, 70942, 116740, 141884, 177355, 233480, 283768, 354710, 461123, 709420, 922246, 1418840, 1844492, 2305615, 3688984, 4611230, 9222460, 18444920]

約数ペア:

[(1, 18444920), (2, 9222460), (4, 4611230), (5, 3688984), (8, 2305615), (10, 1844492), (13, 1418840), (20, 922246), (26, 709420), (40, 461123), (52, 354710), (65, 283768), (79, 233480), (104, 177355), (130, 141884), (158, 116740), (260, 70942), (316, 58370), (395, 46696), (449, 41080), (520, 35471), (632, 29185), (790, 23348), (898, 20540), (1027, 17960), (1580, 11674), (1796, 10270), (2054, 8980), (2245, 8216), (3160, 5837), (3592, 5135), (4108, 4490)]