20988700

素因数分解:

$2^2\times 5^2\times {\mathrm{209887}}^1$

素因数の和:209901

約数の個数: 18

約数和(自身を含む): 45545696

約数和(自身を除く): 24556996

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 209887, 419774, 839548, 1049435, 2098870, 4197740, 5247175, 10494350, 20988700]

約数ペア:

[(1, 20988700), (2, 10494350), (4, 5247175), (5, 4197740), (10, 2098870), (20, 1049435), (25, 839548), (50, 419774), (100, 209887)]