19905125

素因数分解:

$5^3\times {\mathrm{59}}^1\times {\mathrm{2699}}^1$

素因数の和:2773

約数の個数: 16

約数和(自身を含む): 25272000

約数和(自身を除く): 5366875

約数列:

[1, 5, 25, 59, 125, 295, 1475, 2699, 7375, 13495, 67475, 159241, 337375, 796205, 3981025, 19905125]

約数ペア:

[(1, 19905125), (5, 3981025), (25, 796205), (59, 337375), (125, 159241), (295, 67475), (1475, 13495), (2699, 7375)]