Greatest Common Factor of 807, 687, 21

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

• Greatest Common Factor of 807, 687, 21 by common division method
• Greatest Common Factor of 807, 687, 21 with matching the biggest common factor

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∴ So the GCF of the given numbers is 3 = 3

Factors of 807

List of positive integer factors of 807 that divides 807 without a remainder.

1,3,269,807

Factors of 687

List of positive integer factors of 687 that divides 687 without a remainder.

1,3,229,687

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 807,687,21 . The biggest common factor number is the GCF number.
So the greatest common factor 807,687,21 is 3.

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

• GCF of 776, 660, 87
• GCF of 952, 658, 74
• GCF of 655, 648, 59
• GCF of 171, 661, 78
• GCF of 226, 357, 21

1. What is the GCF of 807, 687, 21?

Answer: GCF of 807, 687, 21 is 3.

2. How to Find the GCF of 807, 687, 21

Answer: Greatest Common Factor(GCF) of 807, 687, 21 = 3

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

Step 2: Then multiply all the prime factors GCF(807, 687, 21) = 3.