Uploaded June 2026 | Updated September 2026, 3 weeks ago

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Learn how to find the Greatest Common Factor (GCF) step-by-step with easy math examples! In this lesson, we’ll explain the GCF and prime factorization. Then, we’ll work through problems involving two numbers and three numbers to help you understand how to identify common factors and find the greatest one.

This video is perfect for students learning:
➡️ Greatest Common Factor (GCF)
➡️ Factors and multiples
➡️ Basic number theory
➡️ Pre-algebra math skills

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Ready to try it yourself? Keep practicing GCF on IXL with interactive questions that adapt to your level: ixl.com/math/grade-7/greatest-common-factor?utm_source=youtube&utm_medium=social&utm_campaign=YT-Tutorials

0:00 Introduction to Greatest Common Factor and Prime Factorization
2:09 What is the greatest common factor of 14 and 21?
2:35 What is the greatest common factor of 25 and 13?
3:12 What is the greatest common factor of 90, 27, and 18?
4:21 Review of how to find the GCF

#GCF