21580521

素因数分解:

$3^1\times {\mathrm{71}}^2\times {\mathrm{1427}}^1$

素因数の和:1572

約数の個数: 12

約数和(自身を含む): 29205456

約数和(自身を除く): 7624935

約数列:

[1, 3, 71, 213, 1427, 4281, 5041, 15123, 101317, 303951, 7193507, 21580521]

約数ペア:

[(1, 21580521), (3, 7193507), (71, 303951), (213, 101317), (1427, 15123), (4281, 5041)]