81212456

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{780889}}^1$

素因数の和:780908

約数の個数: 16

約数和(自身を含む): 163986900

約数和(自身を除く): 82774444

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 780889, 1561778, 3123556, 6247112, 10151557, 20303114, 40606228, 81212456]

約数ペア:

[(1, 81212456), (2, 40606228), (4, 20303114), (8, 10151557), (13, 6247112), (26, 3123556), (52, 1561778), (104, 780889)]