12, 16 and 18
Eight of them.
That's an infinite list unless you restrict it to factor pairs. The factor pairs of 120 are (120,1)(60,2)(40,3)(30,4)(24,5)(20,6)(15,8)(12,10)
The factor pairs of 120 are 1*120, 2*60, 3*40, 4*30, 5*24, 6*20, 8*15, and 10*12
The largest single factor of any positive number is the number itself.
(120,1)(60,2)(40,3)(30,4)(24,5)(20,6)(15,8)(12,10)
120 is the only factor of 240 which lies between 100 and 200.
None of the factor pairs of 120 add up to -14. If that was -120, you could use -20 and 6.
(60,2)(40,3)(30,4)(24,5)(20,6)
4/120, 8/60
To do that, we'll need the factor pairs of 120. (120, 1) (60, 2) (40, 3) (30, 4) (24, 5) (20, 6) (15, 8) (12, 10) Choose the pairs that have an odd and even number. Looks like 4 of them.
(1, 120)(2, 60)(3, 40)(4, 30)(5, 24)(6, 20)(8, 15)(10, 12)
120 60,2 30,2,2 15,2,2,2 5,3,2,2,2