21000427925

素因数分解:

$5^2\times {\mathrm{71}}^3\times {\mathrm{2347}}^1$

素因数の和:2570

約数の個数: 24

約数和(自身を含む): 26423790912

約数和(自身を除く): 5423362987

約数列:

[1, 5, 25, 71, 355, 1775, 2347, 5041, 11735, 25205, 58675, 126025, 166637, 357911, 833185, 1789555, 4165925, 8947775, 11831227, 59156135, 295780675, 840017117, 4200085585, 21000427925]

約数ペア:

[(1, 21000427925), (5, 4200085585), (25, 840017117), (71, 295780675), (355, 59156135), (1775, 11831227), (2347, 8947775), (5041, 4165925), (11735, 1789555), (25205, 833185), (58675, 357911), (126025, 166637)]