78642009

素因数分解:

$3^4\times {\mathrm{31}}^1\times {\mathrm{31319}}^1$

素因数の和:31362

約数の個数: 20

約数和(自身を含む): 121271040

約数和(自身を除く): 42629031

約数列:

[1, 3, 9, 27, 31, 81, 93, 279, 837, 2511, 31319, 93957, 281871, 845613, 970889, 2536839, 2912667, 8738001, 26214003, 78642009]

約数ペア:

[(1, 78642009), (3, 26214003), (9, 8738001), (27, 2912667), (31, 2536839), (81, 970889), (93, 845613), (279, 281871), (837, 93957), (2511, 31319)]