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The greatest common factor of 21 and 31 is 1

The greatest common factor (GCF) is often also called the greatest common divisor (GCD) or highest common factor (HCF). Keep in mind that these different terms all refer to the same thing: the largest integer which evenly divides two or more numbers.

The factors of 21 are: 1, 3, 7, 21

The factors of 31 are: 1, 31

The common factors are: 1

  • The Greatest Common Factor (GCF) is: 1
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Q: What is the greatest common factor of 21 and 31?
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What is the greatest common factor of 217 93 155?

greatest common factor of 217 93 155 is 31.


What is the greatest common factor of 93 and 124?

A factor is a divisor - a number that will evenly divide into another number. The greatest common factor of two or more numbers is the largest factor that both numbers have in common. One way to determine the common factors and greatest common factor is to find all the factors of the numbers and compare them. The factors of 93 are 1, 3, 31, and 93. The factors of 124 are 1, 2, 4, 31, 62, and 124. The common factors are 1 and 31. Therefore, the greatest common factor is 31.


What is the greatest common factor of 64 80 and 120?

The greatest common factor (GCF) of 64, 80, and 120 is: 8


What is the greatest common factor of 62?

There is not a greatest common factor of a single number, such as 62, because there cannot be a greatest common factor without two or more numbers to compare. Common factors are factors that the numbers being compared have in common. The greatest common factor is the largest factor that all the numbers being compared have in common. Thus, since there are not two or more numbers to compare, there are neither common factors nor a greatest common factor.The factors of 62 are 1, 2, 31, and 62.The prime factors of 62 are 2 and 31.Examples:The greatest common factor of 43 and 62 is 1.The greatest common factor of 62 and 96 is 2.The greatest common factor of 62 and 155 is 31.You need at least two numbers to find GCF. If that's 6 and 2, the GCF is 2.


What is the greatest common factor of 91 and 217?

The greatest common factor of 91 and 217 is 7 (and the lowest common multiple is 2,821)The factors of 91 are: 1, 7, 13, 91The factors of 217 are: 1, 7, 31, 217The common factors are: 1, 7The Greatest Common Factor (GCF) is: 7The Greatest Common Factor (GCF) is: 7

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