20397897

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{313}}^1\times {\mathrm{557}}^1$

素因数の和:889

約数の個数: 24

約数和(自身を含む): 31888584

約数和(自身を除く): 11490687

約数列:

[1, 3, 9, 13, 39, 117, 313, 557, 939, 1671, 2817, 4069, 5013, 7241, 12207, 21723, 36621, 65169, 174341, 523023, 1569069, 2266433, 6799299, 20397897]

約数ペア:

[(1, 20397897), (3, 6799299), (9, 2266433), (13, 1569069), (39, 523023), (117, 174341), (313, 65169), (557, 36621), (939, 21723), (1671, 12207), (2817, 7241), (4069, 5013)]