(60,2)(40,3)(30,4)(24,5)(20,6)
One pair: it's a prime number.
Two of them.
Three of them.
225 has five factor pairs:225,175,345,525,915,15
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)
Sixteen factor pairs.
The factor pairs of 120 are 1*120, 2*60, 3*40, 4*30, 5*24, 6*20, 8*15, and 10*12
30 has four factor pairs:30,115,210,36,5
20 has 3 factor pairs. Pairs are (1,20), (2,10) and (9,9)
(120,1)(60,2)(40,3)(30,4)(24,5)(20,6)(15,8)(12,10)
12 has 3 factor pairs and the pairs are (1,12), (2,6) and (3,4).
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)
76 has 3 factor pairs: (1,76), (2,38), (4,19).
One pair: it's a prime number.
4/120, 8/60