81638459

素因数分解:

$7^3\times {\mathrm{19}}^1\times {\mathrm{12527}}^1$

素因数の和:12567

約数の個数: 16

約数和(自身を含む): 100224000

約数和(自身を除く): 18585541

約数列:

[1, 7, 19, 49, 133, 343, 931, 6517, 12527, 87689, 238013, 613823, 1666091, 4296761, 11662637, 81638459]

約数ペア:

[(1, 81638459), (7, 11662637), (19, 4296761), (49, 1666091), (133, 613823), (343, 238013), (931, 87689), (6517, 12527)]