31507640

素因数分解:

$2^3\times 5^1\times {\mathrm{421}}^1\times {\mathrm{1871}}^1$

素因数の和:2303

約数の個数: 32

約数和(自身を含む): 71098560

約数和(自身を除く): 39590920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 421, 842, 1684, 1871, 2105, 3368, 3742, 4210, 7484, 8420, 9355, 14968, 16840, 18710, 37420, 74840, 787691, 1575382, 3150764, 3938455, 6301528, 7876910, 15753820, 31507640]

約数ペア:

[(1, 31507640), (2, 15753820), (4, 7876910), (5, 6301528), (8, 3938455), (10, 3150764), (20, 1575382), (40, 787691), (421, 74840), (842, 37420), (1684, 18710), (1871, 16840), (2105, 14968), (3368, 9355), (3742, 8420), (4210, 7484)]