21273245

素因数分解:

$5^1\times 7^1\times {\mathrm{397}}^1\times {\mathrm{1531}}^1$

素因数の和:1940

約数の個数: 16

約数和(自身を含む): 29267328

約数和(自身を除く): 7994083

約数列:

[1, 5, 7, 35, 397, 1531, 1985, 2779, 7655, 10717, 13895, 53585, 607807, 3039035, 4254649, 21273245]

約数ペア:

[(1, 21273245), (5, 4254649), (7, 3039035), (35, 607807), (397, 53585), (1531, 13895), (1985, 10717), (2779, 7655)]