21081208

素因数分解:

$2^3\times {\mathrm{641}}^1\times {\mathrm{4111}}^1$

素因数の和:4758

約数の個数: 16

約数和(自身を含む): 39598560

約数和(自身を除く): 18517352

約数列:

[1, 2, 4, 8, 641, 1282, 2564, 4111, 5128, 8222, 16444, 32888, 2635151, 5270302, 10540604, 21081208]

約数ペア:

[(1, 21081208), (2, 10540604), (4, 5270302), (8, 2635151), (641, 32888), (1282, 16444), (2564, 8222), (4111, 5128)]