18721503

素因数分解:

$3^3\times {\mathrm{661}}^1\times {\mathrm{1049}}^1$

素因数の和:1719

約数の個数: 16

約数和(自身を含む): 27804000

約数和(自身を除く): 9082497

約数列:

[1, 3, 9, 27, 661, 1049, 1983, 3147, 5949, 9441, 17847, 28323, 693389, 2080167, 6240501, 18721503]

約数ペア:

[(1, 18721503), (3, 6240501), (9, 2080167), (27, 693389), (661, 28323), (1049, 17847), (1983, 9441), (3147, 5949)]