17987809

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{199}}^1\times {\mathrm{349}}^1$

素因数の和:592

約数の個数: 16

約数和(自身を含む): 21280000

約数和(自身を除く): 3292191

約数列:

[1, 7, 37, 199, 259, 349, 1393, 2443, 7363, 12913, 51541, 69451, 90391, 486157, 2569687, 17987809]

約数ペア:

[(1, 17987809), (7, 2569687), (37, 486157), (199, 90391), (259, 69451), (349, 51541), (1393, 12913), (2443, 7363)]