21090727

素因数分解:

$7^3\times {\mathrm{17}}^1\times {\mathrm{3617}}^1$

素因数の和:3655

約数の個数: 16

約数和(自身を含む): 26049600

約数和(自身を除く): 4958873

約数列:

[1, 7, 17, 49, 119, 343, 833, 3617, 5831, 25319, 61489, 177233, 430423, 1240631, 3012961, 21090727]

約数ペア:

[(1, 21090727), (7, 3012961), (17, 1240631), (49, 430423), (119, 177233), (343, 61489), (833, 25319), (3617, 5831)]