20121247989

素因数分解:

$3^4\times {\mathrm{71}}^1\times {\mathrm{3498739}}^1$

素因数の和:3498822

約数の個数: 20

約数和(自身を含む): 30481022880

約数和(自身を除く): 10359774891

約数列:

[1, 3, 9, 27, 71, 81, 213, 639, 1917, 5751, 3498739, 10496217, 31488651, 94465953, 248410469, 283397859, 745231407, 2235694221, 6707082663, 20121247989]

約数ペア:

[(1, 20121247989), (3, 6707082663), (9, 2235694221), (27, 745231407), (71, 283397859), (81, 248410469), (213, 94465953), (639, 31488651), (1917, 10496217), (5751, 3498739)]