20578509

素因数分解:

$3^3\times 7^1\times {\mathrm{108881}}^1$

素因数の和:108897

約数の個数: 16

約数和(自身を含む): 34842240

約数和(自身を除く): 14263731

約数列:

[1, 3, 7, 9, 21, 27, 63, 189, 108881, 326643, 762167, 979929, 2286501, 2939787, 6859503, 20578509]

約数ペア:

[(1, 20578509), (3, 6859503), (7, 2939787), (9, 2286501), (21, 979929), (27, 762167), (63, 326643), (189, 108881)]