Greatest Common Factor of 685, 977, 21

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

• Greatest Common Factor of 685, 977, 21 by common division method
• Greatest Common Factor of 685, 977, 21 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 685

List of positive integer factors of 685 that divides 685 without a remainder.

1,5,137,685

Factors of 977

List of positive integer factors of 977 that divides 977 without a remainder.

1,977

Factors of 21

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

1,3,7,21

Greatest Common Factor

We found the factors 685,977,21 . The biggest common factor number is the GCF number.
So the greatest common factor 685,977,21 is 1.

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

• GCF of 484, 427, 16
• GCF of 977, 349, 58
• GCF of 119, 215, 22
• GCF of 750, 423, 33
• GCF of 141, 593, 16

1. What is the GCF of 685, 977, 21?

Answer: GCF of 685, 977, 21 is 1.

2. How to Find the GCF of 685, 977, 21

Answer: Greatest Common Factor(GCF) of 685, 977, 21 = 1

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

Step 2: Then multiply all the prime factors GCF(685, 977, 21) = 1.