80920225

素因数分解:

$5^2\times {\mathrm{809}}^1\times {\mathrm{4001}}^1$

素因数の和:4820

約数の個数: 12

約数和(自身を含む): 100490220

約数和(自身を除く): 19569995

約数列:

[1, 5, 25, 809, 4001, 4045, 20005, 20225, 100025, 3236809, 16184045, 80920225]

約数ペア:

[(1, 80920225), (5, 16184045), (25, 3236809), (809, 100025), (4001, 20225), (4045, 20005)]