19810209

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{277}}^1\times {\mathrm{769}}^1$

素因数の和:1080

約数の個数: 16

約数和(自身を含む): 27399680

約数和(自身を除く): 7589471

約数列:

[1, 3, 31, 93, 277, 769, 831, 2307, 8587, 23839, 25761, 71517, 213013, 639039, 6603403, 19810209]

約数ペア:

[(1, 19810209), (3, 6603403), (31, 639039), (93, 213013), (277, 71517), (769, 25761), (831, 23839), (2307, 8587)]