21850505

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{2311}}^1$

素因数の和:2408

約数の個数: 16

約数和(自身を含む): 27522048

約数和(自身を除く): 5671543

約数列:

[1, 5, 31, 61, 155, 305, 1891, 2311, 9455, 11555, 71641, 140971, 358205, 704855, 4370101, 21850505]

約数ペア:

[(1, 21850505), (5, 4370101), (31, 704855), (61, 358205), (155, 140971), (305, 71641), (1891, 11555), (2311, 9455)]