257517639

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{403001}}^1$

素因数の和:403078

約数の個数: 12

約数和(自身を含む): 377209872

約数和(自身を除く): 119692233

約数列:

[1, 3, 9, 71, 213, 639, 403001, 1209003, 3627009, 28613071, 85839213, 257517639]

約数ペア:

[(1, 257517639), (3, 85839213), (9, 28613071), (71, 3627009), (213, 1209003), (639, 403001)]