20851389

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{13709}}^1$

素因数の和:13741

約数の個数: 18

約数和(自身を含む): 32616090

約数和(自身を除く): 11764701

約数列:

[1, 3, 9, 13, 39, 117, 169, 507, 1521, 13709, 41127, 123381, 178217, 534651, 1603953, 2316821, 6950463, 20851389]

約数ペア:

[(1, 20851389), (3, 6950463), (9, 2316821), (13, 1603953), (39, 534651), (117, 178217), (169, 123381), (507, 41127), (1521, 13709)]