Which is the prime factorization of 540?

Sure, here are the steps to find the prime factorization of 540:

1. Start by dividing the number by the smallest prime number, which is 2. 540 ÷ 2 = 270.
2. Repeat the process with the quotient. 270 ÷ 2 = 135.
3. Now, 135 is not divisible by 2, so we move on to the next prime number, which is 3. 135 ÷ 3 = 45.
4. Repeat the process with the quotient. 45 ÷ 3 = 15.
5. Repeat the process again. 15 ÷ 3 = 5.
6. Now, 5 is a prime number itself, so our process stops here.

So, the prime factorization of 540 is 2^2 * 3^3 * 5.