21108759

素因数分解:

$3^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{3881}}^1$

素因数の和:3935

約数の個数: 24

約数和(自身を含む): 33633648

約数和(自身を除く): 12524889

約数列:

[1, 3, 7, 21, 37, 49, 111, 147, 259, 777, 1813, 3881, 5439, 11643, 27167, 81501, 143597, 190169, 430791, 570507, 1005179, 3015537, 7036253, 21108759]

約数ペア:

[(1, 21108759), (3, 7036253), (7, 3015537), (21, 1005179), (37, 570507), (49, 430791), (111, 190169), (147, 143597), (259, 81501), (777, 27167), (1813, 11643), (3881, 5439)]