12891920

素因数分解:

$2^4\times 5^1\times {\mathrm{161149}}^1$

素因数の和:161162

約数の個数: 20

約数和(自身を含む): 29973900

約数和(自身を除く): 17081980

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 161149, 322298, 644596, 805745, 1289192, 1611490, 2578384, 3222980, 6445960, 12891920]

約数ペア:

[(1, 12891920), (2, 6445960), (4, 3222980), (5, 2578384), (8, 1611490), (10, 1289192), (16, 805745), (20, 644596), (40, 322298), (80, 161149)]