81387261

素因数分解:

$3^5\times {\mathrm{43}}^1\times {\mathrm{7789}}^1$

素因数の和:7847

約数の個数: 24

約数和(自身を含む): 124764640

約数和(自身を除く): 43377379

約数列:

[1, 3, 9, 27, 43, 81, 129, 243, 387, 1161, 3483, 7789, 10449, 23367, 70101, 210303, 334927, 630909, 1004781, 1892727, 3014343, 9043029, 27129087, 81387261]

約数ペア:

[(1, 81387261), (3, 27129087), (9, 9043029), (27, 3014343), (43, 1892727), (81, 1004781), (129, 630909), (243, 334927), (387, 210303), (1161, 70101), (3483, 23367), (7789, 10449)]