18720858

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{240011}}^1$

素因数の和:240029

約数の個数: 16

約数和(自身を含む): 40322016

約数和(自身を除く): 21601158

約数列:

[1, 2, 3, 6, 13, 26, 39, 78, 240011, 480022, 720033, 1440066, 3120143, 6240286, 9360429, 18720858]

約数ペア:

[(1, 18720858), (2, 9360429), (3, 6240286), (6, 3120143), (13, 1440066), (26, 720033), (39, 480022), (78, 240011)]