2021720900

素因数分解:

$2^2\times 5^2\times {\mathrm{20217209}}^1$

素因数の和:20217223

約数の個数: 18

約数和(自身を含む): 4387134570

約数和(自身を除く): 2365413670

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 20217209, 40434418, 80868836, 101086045, 202172090, 404344180, 505430225, 1010860450, 2021720900]

約数ペア:

[(1, 2021720900), (2, 1010860450), (4, 505430225), (5, 404344180), (10, 202172090), (20, 101086045), (25, 80868836), (50, 40434418), (100, 20217209)]