22225555

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{4001}}^1$

素因数の和:4118

約数の個数: 16

約数和(自身を含む): 29390688

約数和(自身を除く): 7165133

約数列:

[1, 5, 11, 55, 101, 505, 1111, 4001, 5555, 20005, 44011, 220055, 404101, 2020505, 4445111, 22225555]

約数ペア:

[(1, 22225555), (5, 4445111), (11, 2020505), (55, 404101), (101, 220055), (505, 44011), (1111, 20005), (4001, 5555)]