20557618

素因数分解:

$2^1\times {\mathrm{109}}^1\times {\mathrm{181}}^1\times {\mathrm{521}}^1$

素因数の和:813

約数の個数: 16

約数和(自身を含む): 31351320

約数和(自身を除く): 10793702

約数列:

[1, 2, 109, 181, 218, 362, 521, 1042, 19729, 39458, 56789, 94301, 113578, 188602, 10278809, 20557618]

約数ペア:

[(1, 20557618), (2, 10278809), (109, 188602), (181, 113578), (218, 94301), (362, 56789), (521, 39458), (1042, 19729)]