20988279

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{13799}}^1$

素因数の和:13831

約数の個数: 18

約数和(自身を含む): 32830200

約数和(自身を除く): 11841921

約数列:

[1, 3, 9, 13, 39, 117, 169, 507, 1521, 13799, 41397, 124191, 179387, 538161, 1614483, 2332031, 6996093, 20988279]

約数ペア:

[(1, 20988279), (3, 6996093), (9, 2332031), (13, 1614483), (39, 538161), (117, 179387), (169, 124191), (507, 41397), (1521, 13799)]