20990500

素因数分解:

$2^2\times 5^3\times {\mathrm{41981}}^1$

素因数の和:42000

約数の個数: 24

約数和(自身を含む): 45844344

約数和(自身を除く): 24853844

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 500, 41981, 83962, 167924, 209905, 419810, 839620, 1049525, 2099050, 4198100, 5247625, 10495250, 20990500]

約数ペア:

[(1, 20990500), (2, 10495250), (4, 5247625), (5, 4198100), (10, 2099050), (20, 1049525), (25, 839620), (50, 419810), (100, 209905), (125, 167924), (250, 83962), (500, 41981)]