816920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1571}}^1$

素因数の和:1595

約数の個数: 32

約数和(自身を含む): 1980720

約数和(自身を除く): 1163800

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 1571, 3142, 6284, 7855, 12568, 15710, 20423, 31420, 40846, 62840, 81692, 102115, 163384, 204230, 408460, 816920]

約数ペア:

[(1, 816920), (2, 408460), (4, 204230), (5, 163384), (8, 102115), (10, 81692), (13, 62840), (20, 40846), (26, 31420), (40, 20423), (52, 15710), (65, 12568), (104, 7855), (130, 6284), (260, 3142), (520, 1571)]