Greatest Common Factor of 81, 21, 655

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

• Greatest Common Factor of 81, 21, 655 by common division method
• Greatest Common Factor of 81, 21, 655 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 655

List of positive integer factors of 655 that divides 655 without a remainder.

1,5,131,655

Greatest Common Factor

We found the factors 81,21,655 . The biggest common factor number is the GCF number.
So the greatest common factor 81,21,655 is 1.

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

• GCF of 92, 89, 800
• GCF of 11, 86, 255
• GCF of 77, 17, 468
• GCF of 70, 86, 281
• GCF of 78, 92, 858

1. What is the GCF of 81, 21, 655?

Answer: GCF of 81, 21, 655 is 1.

2. How to Find the GCF of 81, 21, 655

Answer: Greatest Common Factor(GCF) of 81, 21, 655 = 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, 655) = 1.