642165680

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{617467}}^1$

素因数の和:617493

約数の個数: 40

約数和(自身を含む): 1607886672

約数和(自身を除く): 965720992

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 617467, 1234934, 2469868, 3087335, 4939736, 6174670, 8027071, 9879472, 12349340, 16054142, 24698680, 32108284, 40135355, 49397360, 64216568, 80270710, 128433136, 160541420, 321082840, 642165680]

約数ペア:

[(1, 642165680), (2, 321082840), (4, 160541420), (5, 128433136), (8, 80270710), (10, 64216568), (13, 49397360), (16, 40135355), (20, 32108284), (26, 24698680), (40, 16054142), (52, 12349340), (65, 9879472), (80, 8027071), (104, 6174670), (130, 4939736), (208, 3087335), (260, 2469868), (520, 1234934), (1040, 617467)]