Question: what prime factors go into 250?
Answer: 250 is a composite number.
Prime factorization: 250 = 2 x 5 x 5 x 5, which can be written 250 = 2 x (5^3)
The exponents in the prime factorization are 1 and 3. ... 
Factors of 250: 1, 2, 5, 10, 25, 50, 125, 250.
Factor pairs: 250 = 1 x 250, 2 x 125, 5 x 50, or 10 x 25.