1278261

素因数分解:

$3^4\times {\mathrm{43}}^1\times {\mathrm{367}}^1$

素因数の和:422

約数の個数: 20

約数和(自身を含む): 1959232

約数和(自身を除く): 680971

約数列:

[1, 3, 9, 27, 43, 81, 129, 367, 387, 1101, 1161, 3303, 3483, 9909, 15781, 29727, 47343, 142029, 426087, 1278261]

約数ペア:

[(1, 1278261), (3, 426087), (9, 142029), (27, 47343), (43, 29727), (81, 15781), (129, 9909), (367, 3483), (387, 3303), (1101, 1161)]