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MathUpdated · Aug 2026
LCM and GCF Calculator
Find the least common multiple and greatest common factor for two or more whole numbers.
Start with your numbers
LCM and GCF Calculator
Change the inputs that matter to your decision. Optional assumptions stay collapsed until you need them.
Your numbers
Enter two or more whole numbers separated by commas or spaces.
Common factors
GCF
6
The least common multiple is 72.
LCM72
Factors of GCF1, 2, 3, 6
Input: 12, 18, 24
GCF is the largest integer that divides every input; LCM is the smallest positive common multiple.
/ 01 · FAQ
Frequently asked questions
Practical notes about the inputs, assumptions, and result.
The GCF is the largest number that divides every input. The LCM is the smallest positive number that every input divides.
/ 02 · RELATED
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