21126555

素因数分解:

$3^3\times 5^1\times {\mathrm{156493}}^1$

素因数の和:156507

約数の個数: 16

約数和(自身を含む): 37558560

約数和(自身を除く): 16432005

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 156493, 469479, 782465, 1408437, 2347395, 4225311, 7042185, 21126555]

約数ペア:

[(1, 21126555), (3, 7042185), (5, 4225311), (9, 2347395), (15, 1408437), (27, 782465), (45, 469479), (135, 156493)]