20997580

素因数分解:

$2^2\times 5^1\times {\mathrm{103}}^1\times {\mathrm{10193}}^1$

素因数の和:10305

約数の個数: 24

約数和(自身を含む): 44527392

約数和(自身を除く): 23529812

約数列:

[1, 2, 4, 5, 10, 20, 103, 206, 412, 515, 1030, 2060, 10193, 20386, 40772, 50965, 101930, 203860, 1049879, 2099758, 4199516, 5249395, 10498790, 20997580]

約数ペア:

[(1, 20997580), (2, 10498790), (4, 5249395), (5, 4199516), (10, 2099758), (20, 1049879), (103, 203860), (206, 101930), (412, 50965), (515, 40772), (1030, 20386), (2060, 10193)]