28128321

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{5591}}^1$

素因数の和:5653

約数の個数: 24

約数和(自身を含む): 44780736

約数和(自身を除く): 16652415

約数列:

[1, 3, 9, 13, 39, 43, 117, 129, 387, 559, 1677, 5031, 5591, 16773, 50319, 72683, 218049, 240413, 654147, 721239, 2163717, 3125369, 9376107, 28128321]

約数ペア:

[(1, 28128321), (3, 9376107), (9, 3125369), (13, 2163717), (39, 721239), (43, 654147), (117, 240413), (129, 218049), (387, 72683), (559, 50319), (1677, 16773), (5031, 5591)]