513
To find two numbers that multiply to 171, we can start by breaking down 171 into its prime factors: 3 x 3 x 19. Since 171 is not a perfect square, the two numbers that multiply to 171 are 3 and 57. So, 3 x 57 = 171.
135
The numbers are: -5 and 3
111 = 3*37
1, 3, 13, 39.
135
-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
5 and -3
-5 and 3