21557207

素因数分解:

$7^3\times {\mathrm{17}}^1\times {\mathrm{3697}}^1$

素因数の和:3735

約数の個数: 16

約数和(自身を含む): 26625600

約数和(自身を除く): 5068393

約数列:

[1, 7, 17, 49, 119, 343, 833, 3697, 5831, 25879, 62849, 181153, 439943, 1268071, 3079601, 21557207]

約数ペア:

[(1, 21557207), (7, 3079601), (17, 1268071), (49, 439943), (119, 181153), (343, 62849), (833, 25879), (3697, 5831)]