21357925

素因数分解:

$5^2\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{311}}^1$

素因数の和:429

約数の個数: 24

約数和(自身を含む): 27623232

約数和(自身を除く): 6265307

約数列:

[1, 5, 25, 41, 67, 205, 311, 335, 1025, 1555, 1675, 2747, 7775, 12751, 13735, 20837, 63755, 68675, 104185, 318775, 520925, 854317, 4271585, 21357925]

約数ペア:

[(1, 21357925), (5, 4271585), (25, 854317), (41, 520925), (67, 318775), (205, 104185), (311, 68675), (335, 63755), (1025, 20837), (1555, 13735), (1675, 12751), (2747, 7775)]