20812900

素因数分解:

$2^2\times 5^2\times {\mathrm{208129}}^1$

素因数の和:208143

約数の個数: 18

約数和(自身を含む): 45164210

約数和(自身を除く): 24351310

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 208129, 416258, 832516, 1040645, 2081290, 4162580, 5203225, 10406450, 20812900]

約数ペア:

[(1, 20812900), (2, 10406450), (4, 5203225), (5, 4162580), (10, 2081290), (20, 1040645), (25, 832516), (50, 416258), (100, 208129)]