20980900

素因数分解:

$2^2\times 5^2\times {\mathrm{209809}}^1$

素因数の和:209823

約数の個数: 18

約数和(自身を含む): 45528770

約数和(自身を除く): 24547870

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 209809, 419618, 839236, 1049045, 2098090, 4196180, 5245225, 10490450, 20980900]

約数ペア:

[(1, 20980900), (2, 10490450), (4, 5245225), (5, 4196180), (10, 2098090), (20, 1049045), (25, 839236), (50, 419618), (100, 209809)]