20781009

素因数分解:

$3^3\times {\mathrm{313}}^1\times {\mathrm{2459}}^1$

素因数の和:2781

約数の個数: 16

約数和(自身を含む): 30897600

約数和(自身を除く): 10116591

約数列:

[1, 3, 9, 27, 313, 939, 2459, 2817, 7377, 8451, 22131, 66393, 769667, 2309001, 6927003, 20781009]

約数ペア:

[(1, 20781009), (3, 6927003), (9, 2309001), (27, 769667), (313, 66393), (939, 22131), (2459, 8451), (2817, 7377)]