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Greatest Common Factor Calculator

Find the greatest common factor (GCF/GCD) of number sets via Euclidean algorithm with steps. Reduce 48:180 to 4:15 correctly — free, local, no signup.

100% Local Browser Native

How to Use the Greatest Common Factor Calculator

1. Enter numbers

Two or more integers.

2. Read the GCF

Euclidean steps shown.

3. Verify with product

GCF×LCM equals the product.

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Frequently Asked Questions

GCF of 48 and 180?

12 — Euclidean remainders (180→48→36→12) find it without factoring both fully. The steps show each remainder.

More than two numbers?

Yes — GCF folds pairwise across sets. Three-number homework works the same way.

GCF vs LCM?

GCF divides both (for simplifying); LCM is a multiple of both (for combining). Product equals GCF×LCM — verify with it.

Do divisor sets upload?

No — math runs locally in your browser. Numbers never leave your device.

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Last updated October 2026