81648357

素因数分解:

$3^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{12917}}^1$

素因数の和:12977

約数の個数: 24

約数和(自身を含む): 129593376

約数和(自身を除く): 47945019

約数列:

[1, 3, 7, 21, 43, 49, 129, 147, 301, 903, 2107, 6321, 12917, 38751, 90419, 271257, 555431, 632933, 1666293, 1898799, 3888017, 11664051, 27216119, 81648357]

約数ペア:

[(1, 81648357), (3, 27216119), (7, 11664051), (21, 3888017), (43, 1898799), (49, 1666293), (129, 632933), (147, 555431), (301, 271257), (903, 90419), (2107, 38751), (6321, 12917)]