3000
All of its multiples from 3 to 999
18000
135
135
-5 and +3
All of its multiples from 3 to 999
18000
135
The numbers are: -5 and 3
111 = 3*37
1, 3, 13, 39.
135
513
-5 and +3
The three prime numbers which multiply to make 231 are 3 x 7 x 11.
The two numbers that multiply to make 51 are 3 and 17, since (3 \times 17 = 51). Alternatively, you could also use the numbers -3 and -17, as multiplying two negative numbers also results in a positive product.
There are 4 of them which are 2*3*3*3 = 54