GCF for 81 and 117

"Greatest Common Factor" Calculator

Greatest Common Factor of

and

What is the Greatest common Divisor of 81 and 117?

Answer: GCF of 81 and 117 is 9

(Nine)

Finding GCF for 81 and 117 using all factors (divisors) listing

The first method to find GCF for numbers 81 and 117 is to list all factors for both numbers and pick the highest common one:

All factors of 81: 1, 3, 9, 27, 81

All factors of 117: 1, 3, 9, 13, 39, 117

So the Greatest Common Factor for 81 and 117 is 9

Finding GCF for 81 and 117 by Prime Factorization

The second method to find GCF for numbers 81 and 117 is to list all Prime Factors for both numbers and multiply the common ones:

All Prime Factors of 81: 3, 3, 3, 3

All Prime Factors of 117: 3, 3, 13

As we can see there are Prime Factors common to both numbers: 3, 3

Now we need to multiply them to find GCF: 3 × 3 = 9

See Also

About "Greatest Common Factor" Calculator

This calculator will help you find the greatest common factor (GCF) of two numbers. For example, it can help you find out what is the Greatest common Divisor of 81 and 117? (The answer is: 9). Select the first number (e.g. '81') and the second number (e.g. '117'). After that hit the 'Calculate' button.
Greatest Common Factor (GCF) also known as the Greatest Common Divisor (GCD) or Highest Common Factor (HCF) - it is the largest positive integer that divides each of the integers with zero remainder

"Greatest Common Factor" Calculator

Greatest Common Factor of

and

GCF Table

Number 1Number 2GCF
661173
671171
681171
691173
701171
711171
721179
731171
741171
751173
761171
771171
7811739
791171
801171
811179
821171
831171
841173
851171
861171
871173
881171
891171
901179
9111713
921171
931173
941171
951171

FAQ

What is the Greatest common Divisor of 81 and 117?

GCF of 81 and 117 is 9

See Also