256581

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1$

素因数の和:82

約数の個数: 32

約数和(自身を含む): 443520

約数和(自身を除く): 186939

約数列:

[1, 3, 9, 13, 17, 27, 39, 43, 51, 117, 129, 153, 221, 351, 387, 459, 559, 663, 731, 1161, 1677, 1989, 2193, 5031, 5967, 6579, 9503, 15093, 19737, 28509, 85527, 256581]

約数ペア:

[(1, 256581), (3, 85527), (9, 28509), (13, 19737), (17, 15093), (27, 9503), (39, 6579), (43, 5967), (51, 5031), (117, 2193), (129, 1989), (153, 1677), (221, 1161), (351, 731), (387, 663), (459, 559)]