20491731

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{739}}^1$

素因数の和:840

約数の個数: 32

約数和(自身を含む): 33152000

約数和(自身を除く): 12660269

約数列:

[1, 3, 9, 13, 27, 39, 79, 117, 237, 351, 711, 739, 1027, 2133, 2217, 3081, 6651, 9243, 9607, 19953, 27729, 28821, 58381, 86463, 175143, 259389, 525429, 758953, 1576287, 2276859, 6830577, 20491731]

約数ペア:

[(1, 20491731), (3, 6830577), (9, 2276859), (13, 1576287), (27, 758953), (39, 525429), (79, 259389), (117, 175143), (237, 86463), (351, 58381), (711, 28821), (739, 27729), (1027, 19953), (2133, 9607), (2217, 9243), (3081, 6651)]