Find all the factors of 18. State which of these factors are even numbers. State which of these factors are prime numbers. Write the first three multiples of 18.

The factors are the numbers in these pairs.
The factors of 18 are $\boxed{\text{1, 2, 3, 6, 9, 18}}$.

The even factors are $\boxed{\text{2, 6, 18}}$.

1 and themselves.

• 1 is not prime.
• 2 is prime (factors: 1, 2).
• 3 is prime (factors: 1, 3).
• 6 is not prime (factors: 1, 2, 3, 6).
• 9 is not prime (factors: 1, 3, 9).
• 18 is not prime (factors: 1, 2, 3, 6, 9, 18). The prime factors are $\boxed{\text{2, 3}}$.

The first three multiples of 18 are $\boxed{\text{18, 36, 54}}$.