Write all the factors of 21.
Use commas to separate them

The factors of 21 are:  
1, 3, 7, 21

Would you like more details on factors or any other related questions?  
Here are some related questions for further exploration:  

1. What are the prime factors of 21?
2. How do you find the greatest common factor (GCF) of two numbers?
3. What is the least common multiple (LCM) of 21 and another number?
4. How do you determine if a number is prime or composite?
5. What are the factors of 21 squared (441)?

**Tip:** A factor is a number that divides evenly into another number, leaving no remainder.

Write all the factors of 21. Use commas to separate them

Learn how to find all the factors of 21, including detailed explanations on divisibility rules and how factors work. Perfect for students in Grades 4-6.

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