18263889

素因数分解:

$3^2\times 7^1\times {\mathrm{131}}^1\times {\mathrm{2213}}^1$

素因数の和:2357

約数の個数: 24

約数和(自身を含む): 30393792

約数和(自身を除く): 12129903

約数列:

[1, 3, 7, 9, 21, 63, 131, 393, 917, 1179, 2213, 2751, 6639, 8253, 15491, 19917, 46473, 139419, 289903, 869709, 2029321, 2609127, 6087963, 18263889]

約数ペア:

[(1, 18263889), (3, 6087963), (7, 2609127), (9, 2029321), (21, 869709), (63, 289903), (131, 139419), (393, 46473), (917, 19917), (1179, 15491), (2213, 8253), (2751, 6639)]