21019724

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{477721}}^1$

素因数の和:477736

約数の個数: 12

約数和(自身を含む): 40128648

約数和(自身を除く): 19108924

約数列:

[1, 2, 4, 11, 22, 44, 477721, 955442, 1910884, 5254931, 10509862, 21019724]

約数ペア:

[(1, 21019724), (2, 10509862), (4, 5254931), (11, 1910884), (22, 955442), (44, 477721)]