That's correct! The prime factors of 28 are indeed {2, 7}. Here’s how it breaks down:

1. Start with 28 and divide by 2 (the smallest prime factor) repeatedly until it no longer divides evenly:
   - \( 28 \div 2 = 14 \)
   - \( 14 \div 2 = 7 \)
2. Now, 7 is itself a prime number and cannot be divided further by any other primes except 7.

Thus, \( 28 = 2 \times 2 \times 7 \), and the distinct prime factors are {2, 7}.

Would you like additional details on factorization or how to find prime factors?

Here are five related questions that expand on this:

1. What are the prime factors of 56?
2. How can we use prime factorization to find the greatest common divisor (GCD) of two numbers?
3. What is the prime factorization of 100, and how does it compare to 28?
4. How do we use prime factorization to determine if a number is a perfect square?
5. Can prime factorization help in simplifying fractions?

**Tip:** Prime factorization is also helpful in finding least common multiples (LCM) and solving problems with fractions.

Explore how to find the prime factors of 28 using division by primes. This problem covers number theory concepts, such as prime factorization and the Fundamental Theorem of Arithmetic. Perfect for Grades 5-7.

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