20906505

素因数分解:

$3^5\times 5^1\times {\mathrm{17207}}^1$

素因数の和:17227

約数の個数: 24

約数和(自身を含む): 37582272

約数和(自身を除く): 16675767

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 1215, 17207, 51621, 86035, 154863, 258105, 464589, 774315, 1393767, 2322945, 4181301, 6968835, 20906505]

約数ペア:

[(1, 20906505), (3, 6968835), (5, 4181301), (9, 2322945), (15, 1393767), (27, 774315), (45, 464589), (81, 258105), (135, 154863), (243, 86035), (405, 51621), (1215, 17207)]