257942391

素因数分解:

$3^1\times 7^1\times {\mathrm{563}}^1\times {\mathrm{21817}}^1$

素因数の和:22390

約数の個数: 16

約数和(自身を含む): 393771264

約数和(自身を除く): 135828873

約数列:

[1, 3, 7, 21, 563, 1689, 3941, 11823, 21817, 65451, 152719, 458157, 12282971, 36848913, 85980797, 257942391]

約数ペア:

[(1, 257942391), (3, 85980797), (7, 36848913), (21, 12282971), (563, 458157), (1689, 152719), (3941, 65451), (11823, 21817)]