18720546

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{240007}}^1$

素因数の和:240025

約数の個数: 16

約数和(自身を含む): 40321344

約数和(自身を除く): 21600798

約数列:

[1, 2, 3, 6, 13, 26, 39, 78, 240007, 480014, 720021, 1440042, 3120091, 6240182, 9360273, 18720546]

約数ペア:

[(1, 18720546), (2, 9360273), (3, 6240182), (6, 3120091), (13, 1440042), (26, 720021), (39, 480014), (78, 240007)]