20212865

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{263}}^1\times {\mathrm{809}}^1$

素因数の和:1096

約数の個数: 16

約数和(自身を含む): 25660800

約数和(自身を除く): 5447935

約数列:

[1, 5, 19, 95, 263, 809, 1315, 4045, 4997, 15371, 24985, 76855, 212767, 1063835, 4042573, 20212865]

約数ペア:

[(1, 20212865), (5, 4042573), (19, 1063835), (95, 212767), (263, 76855), (809, 24985), (1315, 15371), (4045, 4997)]