18510640

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{5381}}^1$

素因数の和:5437

約数の個数: 40

約数和(自身を含む): 44046288

約数和(自身を除く): 25535648

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 5381, 10762, 21524, 26905, 43048, 53810, 86096, 107620, 215240, 231383, 430480, 462766, 925532, 1156915, 1851064, 2313830, 3702128, 4627660, 9255320, 18510640]

約数ペア:

[(1, 18510640), (2, 9255320), (4, 4627660), (5, 3702128), (8, 2313830), (10, 1851064), (16, 1156915), (20, 925532), (40, 462766), (43, 430480), (80, 231383), (86, 215240), (172, 107620), (215, 86096), (344, 53810), (430, 43048), (688, 26905), (860, 21524), (1720, 10762), (3440, 5381)]