What is Prime Factorization — Definition & Examples

Brian was entered into a contest to go see DJ Khaled's final performance. In order to win the tickets Brian must answer three questions correctly. The first question he was asked is what phrase is DJ Khaled most known for? Brian answers this question correctly. The second question is what is DJ Khaled's son's name. Brian answers this question correctly as well. The final question is, "What is his favorite number?"

Brian was given two clues:

1. This number does not have repeating prime factors.
2. The prime factors of this number are all of the prime factors less than $20$.

Brian answers this question correctly and wins the tickets. What is the number Brian chose?