81156920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{156071}}^1$

素因数の和:156095

約数の個数: 32

約数和(自身を含む): 196650720

約数和(自身を除く): 115493800

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 156071, 312142, 624284, 780355, 1248568, 1560710, 2028923, 3121420, 4057846, 6242840, 8115692, 10144615, 16231384, 20289230, 40578460, 81156920]

約数ペア:

[(1, 81156920), (2, 40578460), (4, 20289230), (5, 16231384), (8, 10144615), (10, 8115692), (13, 6242840), (20, 4057846), (26, 3121420), (40, 2028923), (52, 1560710), (65, 1248568), (104, 780355), (130, 624284), (260, 312142), (520, 156071)]