20511799

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{61}}^1\times {\mathrm{397}}^1$

素因数の和:487

約数の個数: 24

約数和(自身を含む): 26255264

約数和(自身を除く): 5743465

約数列:

[1, 7, 11, 61, 77, 121, 397, 427, 671, 847, 2779, 4367, 4697, 7381, 24217, 30569, 48037, 51667, 169519, 266387, 336259, 1864709, 2930257, 20511799]

約数ペア:

[(1, 20511799), (7, 2930257), (11, 1864709), (61, 336259), (77, 266387), (121, 169519), (397, 51667), (427, 48037), (671, 30569), (847, 24217), (2779, 7381), (4367, 4697)]