Greatest Common Factor of 63, 21, 688

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

• Greatest Common Factor of 63, 21, 688 by common division method
• Greatest Common Factor of 63, 21, 688 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 63

List of positive integer factors of 63 that divides 63 without a remainder.

1,3,7,9,21,63

Factors of 21

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

1,3,7,21

Factors of 688

List of positive integer factors of 688 that divides 688 without a remainder.

1,2,4,8,16,43,86,172,344,688

Greatest Common Factor

We found the factors 63,21,688 . The biggest common factor number is the GCF number.
So the greatest common factor 63,21,688 is 1.

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

• GCF of 41, 12, 885
• GCF of 92, 49, 148
• GCF of 23, 48, 277
• GCF of 83, 99, 450
• GCF of 18, 33, 764

1. What is the GCF of 63, 21, 688?

Answer: GCF of 63, 21, 688 is 1.

2. How to Find the GCF of 63, 21, 688

Answer: Greatest Common Factor(GCF) of 63, 21, 688 = 1

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

Step 2: Then multiply all the prime factors GCF(63, 21, 688) = 1.