18720830

素因数分解:

$2^1\times 5^1\times {\mathrm{181}}^1\times {\mathrm{10343}}^1$

素因数の和:10531

約数の個数: 16

約数和(自身を含む): 33886944

約数和(自身を除く): 15166114

約数列:

[1, 2, 5, 10, 181, 362, 905, 1810, 10343, 20686, 51715, 103430, 1872083, 3744166, 9360415, 18720830]

約数ペア:

[(1, 18720830), (2, 9360415), (5, 3744166), (10, 1872083), (181, 103430), (362, 51715), (905, 20686), (1810, 10343)]