21709580

素因数分解:

$2^2\times 5^1\times {\mathrm{709}}^1\times {\mathrm{1531}}^1$

素因数の和:2249

約数の個数: 24

約数和(自身を含む): 45684240

約数和(自身を除く): 23974660

約数列:

[1, 2, 4, 5, 10, 20, 709, 1418, 1531, 2836, 3062, 3545, 6124, 7090, 7655, 14180, 15310, 30620, 1085479, 2170958, 4341916, 5427395, 10854790, 21709580]

約数ペア:

[(1, 21709580), (2, 10854790), (4, 5427395), (5, 4341916), (10, 2170958), (20, 1085479), (709, 30620), (1418, 15310), (1531, 14180), (2836, 7655), (3062, 7090), (3545, 6124)]