20448740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78649}}^1$

素因数の和:78671

約数の個数: 24

約数和(自身を含む): 46246200

約数和(自身を除く): 25797460

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 78649, 157298, 314596, 393245, 786490, 1022437, 1572980, 2044874, 4089748, 5112185, 10224370, 20448740]

約数ペア:

[(1, 20448740), (2, 10224370), (4, 5112185), (5, 4089748), (10, 2044874), (13, 1572980), (20, 1022437), (26, 786490), (52, 393245), (65, 314596), (130, 157298), (260, 78649)]