81794960

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78649}}^1$

素因数の和:78675

約数の個数: 40

約数和(自身を含む): 204804600

約数和(自身を除く): 123009640

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 78649, 157298, 314596, 393245, 629192, 786490, 1022437, 1258384, 1572980, 2044874, 3145960, 4089748, 5112185, 6291920, 8179496, 10224370, 16358992, 20448740, 40897480, 81794960]

約数ペア:

[(1, 81794960), (2, 40897480), (4, 20448740), (5, 16358992), (8, 10224370), (10, 8179496), (13, 6291920), (16, 5112185), (20, 4089748), (26, 3145960), (40, 2044874), (52, 1572980), (65, 1258384), (80, 1022437), (104, 786490), (130, 629192), (208, 393245), (260, 314596), (520, 157298), (1040, 78649)]