Calculators
GCD & LCM Calculator
Greatest common divisor & lowest multiple.
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GCD (HCF)
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LCM
Prime factorization
This free GCD and LCM calculator finds the greatest common divisor (also called the highest common factor) and the least common multiple of two or more whole numbers. Enter any list of integers separated by commas or spaces. It is handy for simplifying fractions and solving number problems.
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