20521879

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{2351}}^1$

素因数の和:2430

約数の個数: 16

約数和(自身を含む): 24837120

約数和(自身を除く): 4315241

約数列:

[1, 7, 29, 43, 203, 301, 1247, 2351, 8729, 16457, 68179, 101093, 477253, 707651, 2931697, 20521879]

約数ペア:

[(1, 20521879), (7, 2931697), (29, 707651), (43, 477253), (203, 101093), (301, 68179), (1247, 16457), (2351, 8729)]