21395575

素因数分解:

$5^2\times {\mathrm{47}}^1\times {\mathrm{131}}^1\times {\mathrm{139}}^1$

素因数の和:327

約数の個数: 24

約数和(自身を含む): 27498240

約数和(自身を除く): 6102665

約数列:

[1, 5, 25, 47, 131, 139, 235, 655, 695, 1175, 3275, 3475, 6157, 6533, 18209, 30785, 32665, 91045, 153925, 163325, 455225, 855823, 4279115, 21395575]

約数ペア:

[(1, 21395575), (5, 4279115), (25, 855823), (47, 455225), (131, 163325), (139, 153925), (235, 91045), (655, 32665), (695, 30785), (1175, 18209), (3275, 6533), (3475, 6157)]