Find the greatest common factor of two or more positive integers.
Last updated: June 2026 | By Patchworkr Team
The greatest common factor is the largest positive integer that divides every input evenly.
The common factors are every positive integer that divides all numbers in the list.
Example: 48, 64, and 80 have GCF 16.
Find the GCF of 48, 64, and 80.
1. Factor 48 = 2^4 x 3
2. Factor 64 = 2^6
3. Factor 80 = 2^4 x 5
4. Common factor = 2^4
Final answer: GCF 16
Yes. The calculator can analyze any length list of positive integers.
This version is focused on positive integers, so invalid inputs are rejected explicitly.
Then the GCF is 1, which is still a valid and useful result.
No. GCF does not depend on the order of the numbers.
Related Tools