21942009

素因数分解:

$3^4\times {\mathrm{29}}^1\times {\mathrm{9341}}^1$

素因数の和:9382

約数の個数: 20

約数和(自身を含む): 33911460

約数和(自身を除く): 11969451

約数列:

[1, 3, 9, 27, 29, 81, 87, 261, 783, 2349, 9341, 28023, 84069, 252207, 270889, 756621, 812667, 2438001, 7314003, 21942009]

約数ペア:

[(1, 21942009), (3, 7314003), (9, 2438001), (27, 812667), (29, 756621), (81, 270889), (87, 252207), (261, 84069), (783, 28023), (2349, 9341)]