21080644

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{7649}}^1$

素因数の和:7719

約数の個数: 24

約数和(自身を含む): 40483800

約数和(自身を除く): 19403156

約数列:

[1, 2, 4, 13, 26, 52, 53, 106, 212, 689, 1378, 2756, 7649, 15298, 30596, 99437, 198874, 397748, 405397, 810794, 1621588, 5270161, 10540322, 21080644]

約数ペア:

[(1, 21080644), (2, 10540322), (4, 5270161), (13, 1621588), (26, 810794), (52, 405397), (53, 397748), (106, 198874), (212, 99437), (689, 30596), (1378, 15298), (2756, 7649)]