LCM & GCF Calculator
Least Common Multiple · Greatest Common Factor

Find LCM and GCD/HCF for 2 to 6 numbers using prime factorization or Euclidean algorithm. Step-by-step breakdown.

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Calculator

Enter Numbers (positive integers)

⚠️ Up to 6 numbers supported. All numbers must be positive integers.

LCM (Least Common Multiple)

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smallest number divisible by all inputs

GCF / GCD (Greatest Common Factor)

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largest number dividing all inputs

📖 Calculation Steps

Enter numbers and click "Calculate" to see detailed steps using prime factorization and Euclidean algorithm.

Quick Reference

Examples of LCM & GCF

LCM & GCF Calculator