20992900

素因数分解:

$2^2\times 5^2\times {\mathrm{209929}}^1$

素因数の和:209943

約数の個数: 18

約数和(自身を含む): 45554810

約数和(自身を除く): 24561910

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 209929, 419858, 839716, 1049645, 2099290, 4198580, 5248225, 10496450, 20992900]

約数ペア:

[(1, 20992900), (2, 10496450), (4, 5248225), (5, 4198580), (10, 2099290), (20, 1049645), (25, 839716), (50, 419858), (100, 209929)]