18720835

素因数分解:

$5^1\times 7^1\times {\mathrm{251}}^1\times {\mathrm{2131}}^1$

素因数の和:2394

約数の個数: 16

約数和(自身を含む): 25788672

約数和(自身を除く): 7067837

約数列:

[1, 5, 7, 35, 251, 1255, 1757, 2131, 8785, 10655, 14917, 74585, 534881, 2674405, 3744167, 18720835]

約数ペア:

[(1, 18720835), (5, 3744167), (7, 2674405), (35, 534881), (251, 74585), (1255, 14917), (1757, 10655), (2131, 8785)]