Question

? numbers can be written as a product of ? factors. this is called the prime factorization of a number

Answer 1

The complete sentence should be:

Composite numbers can be written as a product of prime factors. This is called the prime factorization of a number.

A prime number is a number that can't be divided by any other number other than 1 or itself. Otherwise, that is a composite number. For example, 50 is a composite number. Through prime factorization,

                  50
                 /   \
               10  5
               /  \
             5  2

The prime factors of composite number 50 are 5, 5 and 2.