21558621

素因数分解:

$3^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{9967}}^1$

素因数の和:10080

約数の個数: 16

約数和(自身を含む): 33173504

約数和(自身を除く): 11614883

約数列:

[1, 3, 7, 21, 103, 309, 721, 2163, 9967, 29901, 69769, 209307, 1026601, 3079803, 7186207, 21558621]

約数ペア:

[(1, 21558621), (3, 7186207), (7, 3079803), (21, 1026601), (103, 209307), (309, 69769), (721, 29901), (2163, 9967)]