21370557

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{61}}^1\times {\mathrm{691}}^1$

素因数の和:781

約数の個数: 24

約数和(自身を含む): 31405728

約数和(自身を除く): 10035171

約数列:

[1, 3, 13, 39, 61, 169, 183, 507, 691, 793, 2073, 2379, 8983, 10309, 26949, 30927, 42151, 116779, 126453, 350337, 547963, 1643889, 7123519, 21370557]

約数ペア:

[(1, 21370557), (3, 7123519), (13, 1643889), (39, 547963), (61, 350337), (169, 126453), (183, 116779), (507, 42151), (691, 30927), (793, 26949), (2073, 10309), (2379, 8983)]