The number in question is 15.

To sort it:

1. 15 is not "1 factor", because all numbers greater than 1 have at least two factors (1 and itself).
2. 15 is not "2 factors (Prime)", because it has more than 2 factors (it is divisible by 1, 3, 5, and 15).
3. 15 belongs in "More than 2 factors (Composite)", because it has four factors: 1, 3, 5, and 15.

Would you like further explanation or clarification?

Related Questions:

1. What are the factors of other composite numbers close to 15, like 12 or 16?
2. Why is 1 not considered prime or composite?
3. What makes a number prime, and how can you quickly identify one?
4. What is the difference between a composite and a prime number?
5. How are prime numbers useful in advanced mathematics?

Tip:

A composite number is simply any number greater than 1 that isn't prime, meaning it has more than two distinct factors.