Answer: 2^4
Explanation: Because 2x2x2x2=16, and 2 is a prime number. The prime factorization of a number means the prime numbers that can multiply to get the number, if that makes any sense. (Sorry, I suck at explanations)
Prime number: A number that can only be divisible by 1 and itself
Factors of a number: Numbers that can be divisible by another number Ex: 3is divisible by 6, so 3 is a factor of 6.