21057212

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{478573}}^1$

素因数の和:478588

約数の個数: 12

約数和(自身を含む): 40200216

約数和(自身を除く): 19143004

約数列:

[1, 2, 4, 11, 22, 44, 478573, 957146, 1914292, 5264303, 10528606, 21057212]

約数ペア:

[(1, 21057212), (2, 10528606), (4, 5264303), (11, 1914292), (22, 957146), (44, 478573)]