20993900

素因数分解:

$2^2\times 5^2\times {\mathrm{209939}}^1$

素因数の和:209953

約数の個数: 18

約数和(自身を含む): 45556980

約数和(自身を除く): 24563080

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 209939, 419878, 839756, 1049695, 2099390, 4198780, 5248475, 10496950, 20993900]

約数ペア:

[(1, 20993900), (2, 10496950), (4, 5248475), (5, 4198780), (10, 2099390), (20, 1049695), (25, 839756), (50, 419878), (100, 209939)]