20648725

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{1499}}^1$

素因数の和:1557

約数の個数: 24

約数和(自身を含む): 27900000

約数和(自身を除く): 7251275

約数列:

[1, 5, 19, 25, 29, 95, 145, 475, 551, 725, 1499, 2755, 7495, 13775, 28481, 37475, 43471, 142405, 217355, 712025, 825949, 1086775, 4129745, 20648725]

約数ペア:

[(1, 20648725), (5, 4129745), (19, 1086775), (25, 825949), (29, 712025), (95, 217355), (145, 142405), (475, 43471), (551, 37475), (725, 28481), (1499, 13775), (2755, 7495)]