21080900

素因数分解:

$2^2\times 5^2\times {\mathrm{210809}}^1$

素因数の和:210823

約数の個数: 18

約数和(自身を含む): 45745770

約数和(自身を除く): 24664870

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 210809, 421618, 843236, 1054045, 2108090, 4216180, 5270225, 10540450, 21080900]

約数ペア:

[(1, 21080900), (2, 10540450), (4, 5270225), (5, 4216180), (10, 2108090), (20, 1054045), (25, 843236), (50, 421618), (100, 210809)]