Find the least common multiple and greatest common factor (also called HCF) of two or more whole numbers at once.
How it works
- Enter a list of two or more whole numbers.
- The engine uses Euclid's algorithm to extract common primes.
- View the lowest common multiple and highest common factor instantly.
Frequently asked questions
Where is LCM used in real life?
Common denominators for fractions, aligning repeating schedules, and gear/cycle problems.
GCF vs HCF — different things?
Same concept, different names: greatest common factor (US) = highest common factor (UK/India).
Why whole numbers only?
LCM/GCF are defined on integers. For decimals, scale them to integers first (×10, ×100…).