Greatest Common Factor of 81, 21, 847

Greatest common factor or Greatest common divisor (GCD) can be calculated in two ways

• Greatest Common Factor of 81, 21, 847 by common division method
• Greatest Common Factor of 81, 21, 847 with matching the biggest common factor

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∴ GCF of numbers is 1 because of no common factors present between them.

Factors of 81

List of positive integer factors of 81 that divides 81 without a remainder.

1,3,9,27,81

Factors of 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

Factors of 847

List of positive integer factors of 847 that divides 847 without a remainder.

1,7,11,77,121,847

Greatest Common Factor

We found the factors 81,21,847 . The biggest common factor number is the GCF number.
So the greatest common factor 81,21,847 is 1.

Here are some samples of GCF of two or more Numbers calculations.

• GCF of 70, 63, 908
• GCF of 28, 17, 264
• GCF of 78, 92, 623
• GCF of 70, 21, 946
• GCF of 38, 20, 909

1. What is the GCF of 81, 21, 847?

Answer: GCF of 81, 21, 847 is 1.

2. How to Find the GCF of 81, 21, 847

Answer: Greatest Common Factor(GCF) of 81, 21, 847 = 1

Step 1: Divide all the numbers with common prime numbers having remainder zero.

Step 2: Then multiply all the prime factors GCF(81, 21, 847) = 1.