656721

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{1871}}^1$

素因数の和:1893

約数の個数: 16

約数和(自身を含む): 1048320

約数和(自身を除く): 391599

約数列:

[1, 3, 9, 13, 27, 39, 117, 351, 1871, 5613, 16839, 24323, 50517, 72969, 218907, 656721]

約数ペア:

[(1, 656721), (3, 218907), (9, 72969), (13, 50517), (27, 24323), (39, 16839), (117, 5613), (351, 1871)]