The prime factorization of 2520 can be obtained by dividing it by prime numbers until the quotient is 1. Starting with the smallest prime number, 2, we have:

2520 ÷ 2 = 1260
1260 ÷ 2 = 630
630 ÷ 2 = 315

315 is not divisible by 2, so we move on to the next prime number, 3:

315 ÷ 3 = 105

105 ÷ 3 = 35

35 is not divisible by 3, so we move on to the next prime number, 5:

35 ÷ 5 = 7

7 is a prime number itself, so we have reached the end of the prime factorization.

Thus, the prime factorization of 2520 is 2 x 2 x 2 x 3 x 3 x 5 x 7, or 2^3 x 3^2 x 5 x 7.

Therefore, the prime factors of 2520 are 2, 3, 5, and 7.