18720818

素因数分解:

$2^1\times {\mathrm{59}}^2\times {\mathrm{2689}}^1$

素因数の和:2809

約数の個数: 12

約数和(自身を含む): 28575870

約数和(自身を除く): 9855052

約数列:

[1, 2, 59, 118, 2689, 3481, 5378, 6962, 158651, 317302, 9360409, 18720818]

約数ペア:

[(1, 18720818), (2, 9360409), (59, 317302), (118, 158651), (2689, 6962), (3481, 5378)]