18640287

素因数分解:

$3^5\times {\mathrm{79}}^1\times {\mathrm{971}}^1$

素因数の和:1065

約数の個数: 24

約数和(自身を含む): 28304640

約数和(自身を除く): 9664353

約数列:

[1, 3, 9, 27, 79, 81, 237, 243, 711, 971, 2133, 2913, 6399, 8739, 19197, 26217, 76709, 78651, 230127, 235953, 690381, 2071143, 6213429, 18640287]

約数ペア:

[(1, 18640287), (3, 6213429), (9, 2071143), (27, 690381), (79, 235953), (81, 230127), (237, 78651), (243, 76709), (711, 26217), (971, 19197), (2133, 8739), (2913, 6399)]