GCD & LCM Calculator

Find GCD & LCM with step-by-step math

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Full guide

How to Calculate GCD and LCM

Learn GCD and LCM with the Euclidean algorithm, prime factors, and the GCD×LCM relationship — plus multi-number examples and a free calculator.

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About GCD & LCM Calculator

A comprehensive GCD (Greatest Common Divisor) and LCM (Least Common Multiple) calculator that works with two or more integers. Shows the step-by-step Euclidean algorithm for GCD computation, prime factorization of each number, and the relationship GCD × LCM = |a × b|. Supports multi-number input for computing GCD and LCM across lists. Also displays Bézout coefficients (ax + by = gcd) and common factor Venn diagrams. Essential for math students, cryptography learners, and anyone working with fractions or number theory.

GCD & LCM Calculator Features

  • Multi-number GCD/LCM
  • Euclidean algorithm steps
  • Prime factorization
  • Bézout coefficients
  • Factor lists
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