20640884

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{131}}^1\times {\mathrm{3581}}^1$

素因数の和:3727

約数の個数: 24

約数和(自身を含む): 39717216

約数和(自身を除く): 19076332

約数列:

[1, 2, 4, 11, 22, 44, 131, 262, 524, 1441, 2882, 3581, 5764, 7162, 14324, 39391, 78782, 157564, 469111, 938222, 1876444, 5160221, 10320442, 20640884]

約数ペア:

[(1, 20640884), (2, 10320442), (4, 5160221), (11, 1876444), (22, 938222), (44, 469111), (131, 157564), (262, 78782), (524, 39391), (1441, 14324), (2882, 7162), (3581, 5764)]