20993889

素因数分解:

$3^1\times 7^1\times {\mathrm{223}}^1\times {\mathrm{4483}}^1$

素因数の和:4716

約数の個数: 16

約数和(自身を含む): 32141312

約数和(自身を除く): 11147423

約数列:

[1, 3, 7, 21, 223, 669, 1561, 4483, 4683, 13449, 31381, 94143, 999709, 2999127, 6997963, 20993889]

約数ペア:

[(1, 20993889), (3, 6997963), (7, 2999127), (21, 999709), (223, 94143), (669, 31381), (1561, 13449), (4483, 4683)]