81691551

素因数分解:

$3^3\times {\mathrm{139}}^1\times {\mathrm{21767}}^1$

素因数の和:21915

約数の個数: 16

約数和(自身を含む): 121900800

約数和(自身を除く): 40209249

約数列:

[1, 3, 9, 27, 139, 417, 1251, 3753, 21767, 65301, 195903, 587709, 3025613, 9076839, 27230517, 81691551]

約数ペア:

[(1, 81691551), (3, 27230517), (9, 9076839), (27, 3025613), (139, 587709), (417, 195903), (1251, 65301), (3753, 21767)]