17643969

素因数分解:

$3^2\times 7^2\times {\mathrm{40009}}^1$

素因数の和:40029

約数の個数: 18

約数和(自身を含む): 29647410

約数和(自身を除く): 12003441

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 40009, 120027, 280063, 360081, 840189, 1960441, 2520567, 5881323, 17643969]

約数ペア:

[(1, 17643969), (3, 5881323), (7, 2520567), (9, 1960441), (21, 840189), (49, 360081), (63, 280063), (147, 120027), (441, 40009)]