636740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1$

素因数の和:132

約数の個数: 48

約数和(自身を含む): 1505280

約数和(自身を除く): 868540

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 79, 124, 130, 155, 158, 260, 310, 316, 395, 403, 620, 790, 806, 1027, 1580, 1612, 2015, 2054, 2449, 4030, 4108, 4898, 5135, 8060, 9796, 10270, 12245, 20540, 24490, 31837, 48980, 63674, 127348, 159185, 318370, 636740]

約数ペア:

[(1, 636740), (2, 318370), (4, 159185), (5, 127348), (10, 63674), (13, 48980), (20, 31837), (26, 24490), (31, 20540), (52, 12245), (62, 10270), (65, 9796), (79, 8060), (124, 5135), (130, 4898), (155, 4108), (158, 4030), (260, 2449), (310, 2054), (316, 2015), (395, 1612), (403, 1580), (620, 1027), (790, 806)]