# Greatest Common Factor Calculator

Please provide numbers separated by comma "," below and click the "Calculate" button to use.

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.