21152391

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{7639}}^1$

素因数の和:7726

約数の個数: 16

約数和(自身を含む): 30804480

約数和(自身を除く): 9652089

約数列:

[1, 3, 13, 39, 71, 213, 923, 2769, 7639, 22917, 99307, 297921, 542369, 1627107, 7050797, 21152391]

約数ペア:

[(1, 21152391), (3, 7050797), (13, 1627107), (39, 542369), (71, 297921), (213, 99307), (923, 22917), (2769, 7639)]