20390643

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{193}}^1$

素因数の和:265

約数の個数: 64

約数和(自身を含む): 38241280

約数和(自身を除く): 17850637

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 43, 63, 91, 117, 129, 189, 193, 273, 301, 351, 387, 559, 579, 819, 903, 1161, 1351, 1677, 1737, 2457, 2509, 2709, 3913, 4053, 5031, 5211, 7527, 8127, 8299, 11739, 12159, 15093, 17563, 22581, 24897, 35217, 36477, 52689, 58093, 67743, 74691, 105651, 107887, 158067, 174279, 224073, 323661, 474201, 522837, 755209, 970983, 1568511, 2265627, 2912949, 6796881, 20390643]

約数ペア:

[(1, 20390643), (3, 6796881), (7, 2912949), (9, 2265627), (13, 1568511), (21, 970983), (27, 755209), (39, 522837), (43, 474201), (63, 323661), (91, 224073), (117, 174279), (129, 158067), (189, 107887), (193, 105651), (273, 74691), (301, 67743), (351, 58093), (387, 52689), (559, 36477), (579, 35217), (819, 24897), (903, 22581), (1161, 17563), (1351, 15093), (1677, 12159), (1737, 11739), (2457, 8299), (2509, 8127), (2709, 7527), (3913, 5211), (4053, 5031)]