1291288311

素因数分解:

$3^4\times {\mathrm{197}}^1\times {\mathrm{80923}}^1$

素因数の和:81132

約数の個数: 20

約数和(自身を含む): 1938777192

約数和(自身を除く): 647488881

約数列:

[1, 3, 9, 27, 81, 197, 591, 1773, 5319, 15957, 80923, 242769, 728307, 2184921, 6554763, 15941831, 47825493, 143476479, 430429437, 1291288311]

約数ペア:

[(1, 1291288311), (3, 430429437), (9, 143476479), (27, 47825493), (81, 15941831), (197, 6554763), (591, 2184921), (1773, 728307), (5319, 242769), (15957, 80923)]