18747775

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{1361}}^1$

素因数の和:1419

約数の個数: 24

約数和(自身を含む): 25333200

約数和(自身を除く): 6585425

約数列:

[1, 5, 19, 25, 29, 95, 145, 475, 551, 725, 1361, 2755, 6805, 13775, 25859, 34025, 39469, 129295, 197345, 646475, 749911, 986725, 3749555, 18747775]

約数ペア:

[(1, 18747775), (5, 3749555), (19, 986725), (25, 749911), (29, 646475), (95, 197345), (145, 129295), (475, 39469), (551, 34025), (725, 25859), (1361, 13775), (2755, 6805)]