21399427

素因数分解:

$7^3\times {\mathrm{89}}^1\times {\mathrm{701}}^1$

素因数の和:811

約数の個数: 16

約数和(自身を含む): 25272000

約数和(自身を除く): 3872573

約数列:

[1, 7, 49, 89, 343, 623, 701, 4361, 4907, 30527, 34349, 62389, 240443, 436723, 3057061, 21399427]

約数ペア:

[(1, 21399427), (7, 3057061), (49, 436723), (89, 240443), (343, 62389), (623, 34349), (701, 30527), (4361, 4907)]