21721467

素因数分解:

$3^1\times {\mathrm{53}}^1\times {\mathrm{67}}^1\times {\mathrm{2039}}^1$

素因数の和:2162

約数の個数: 16

約数和(自身を含む): 29963520

約数和(自身を除く): 8242053

約数列:

[1, 3, 53, 67, 159, 201, 2039, 3551, 6117, 10653, 108067, 136613, 324201, 409839, 7240489, 21721467]

約数ペア:

[(1, 21721467), (3, 7240489), (53, 409839), (67, 324201), (159, 136613), (201, 108067), (2039, 10653), (3551, 6117)]