20512900

素因数分解:

$2^2\times 5^2\times {\mathrm{205129}}^1$

素因数の和:205143

約数の個数: 18

約数和(自身を含む): 44513210

約数和(自身を除く): 24000310

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 205129, 410258, 820516, 1025645, 2051290, 4102580, 5128225, 10256450, 20512900]

約数ペア:

[(1, 20512900), (2, 10256450), (4, 5128225), (5, 4102580), (10, 2051290), (20, 1025645), (25, 820516), (50, 410258), (100, 205129)]