81998721

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{30269}}^1$

素因数の和:30325

約数の個数: 24

約数和(自身を含む): 138515520

約数和(自身を除く): 56516799

約数列:

[1, 3, 7, 9, 21, 43, 63, 129, 301, 387, 903, 2709, 30269, 90807, 211883, 272421, 635649, 1301567, 1906947, 3904701, 9110969, 11714103, 27332907, 81998721]

約数ペア:

[(1, 81998721), (3, 27332907), (7, 11714103), (9, 9110969), (21, 3904701), (43, 1906947), (63, 1301567), (129, 635649), (301, 272421), (387, 211883), (903, 90807), (2709, 30269)]