Greatest Common Factor Calculator
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In mathematics, the greatest common divisor (GCD) is the largest positive integer that divides a group of numbers without a remainder. It is usually denoted by GCD(a, b, ...). Least common multiple is also called the greatest common factor (GCF), highest common factor (HCF), or greatest common measure (GCM). For example, since 20/10=2 and 30/10=3, GCD (20, 30) = 10.