21283689

素因数分解:

$3^1\times 7^2\times {\mathrm{67}}^1\times {\mathrm{2161}}^1$

素因数の和:2245

約数の個数: 24

約数和(自身を含む): 33519648

約数和(自身を除く): 12235959

約数列:

[1, 3, 7, 21, 49, 67, 147, 201, 469, 1407, 2161, 3283, 6483, 9849, 15127, 45381, 105889, 144787, 317667, 434361, 1013509, 3040527, 7094563, 21283689]

約数ペア:

[(1, 21283689), (3, 7094563), (7, 3040527), (21, 1013509), (49, 434361), (67, 317667), (147, 144787), (201, 105889), (469, 45381), (1407, 15127), (2161, 9849), (3283, 6483)]