21221020

素因数分解:

$2^2\times 5^1\times {\mathrm{491}}^1\times {\mathrm{2161}}^1$

素因数の和:2661

約数の個数: 24

約数和(自身を含む): 44675568

約数和(自身を除く): 23454548

約数列:

[1, 2, 4, 5, 10, 20, 491, 982, 1964, 2161, 2455, 4322, 4910, 8644, 9820, 10805, 21610, 43220, 1061051, 2122102, 4244204, 5305255, 10610510, 21221020]

約数ペア:

[(1, 21221020), (2, 10610510), (4, 5305255), (5, 4244204), (10, 2122102), (20, 1061051), (491, 43220), (982, 21610), (1964, 10805), (2161, 9820), (2455, 8644), (4322, 4910)]