21245205

素因数分解:

$3^1\times 5^1\times {\mathrm{757}}^1\times {\mathrm{1871}}^1$

素因数の和:2636

約数の個数: 16

約数和(自身を含む): 34055424

約数和(自身を除く): 12810219

約数列:

[1, 3, 5, 15, 757, 1871, 2271, 3785, 5613, 9355, 11355, 28065, 1416347, 4249041, 7081735, 21245205]

約数ペア:

[(1, 21245205), (3, 7081735), (5, 4249041), (15, 1416347), (757, 28065), (1871, 11355), (2271, 9355), (3785, 5613)]