21092020

素因数分解:

$2^2\times 5^1\times {\mathrm{311}}^1\times {\mathrm{3391}}^1$

素因数の和:3711

約数の個数: 24

約数和(自身を含む): 44448768

約数和(自身を除く): 23356748

約数列:

[1, 2, 4, 5, 10, 20, 311, 622, 1244, 1555, 3110, 3391, 6220, 6782, 13564, 16955, 33910, 67820, 1054601, 2109202, 4218404, 5273005, 10546010, 21092020]

約数ペア:

[(1, 21092020), (2, 10546010), (4, 5273005), (5, 4218404), (10, 2109202), (20, 1054601), (311, 67820), (622, 33910), (1244, 16955), (1555, 13564), (3110, 6782), (3391, 6220)]