Greatest Common Factor of 663, 852, 21

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

• Greatest Common Factor of 663, 852, 21 by common division method
• Greatest Common Factor of 663, 852, 21 with matching the biggest common factor

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

Factors of 663

List of positive integer factors of 663 that divides 663 without a remainder.

1,3,13,17,39,51,221,663

Factors of 852

List of positive integer factors of 852 that divides 852 without a remainder.

1,2,3,4,6,12,71,142,213,284,426,852

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 663,852,21 . The biggest common factor number is the GCF number.
So the greatest common factor 663,852,21 is 3.

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

• GCF of 147, 100, 21
• GCF of 932, 876, 39
• GCF of 755, 289, 73
• GCF of 861, 545, 47
• GCF of 942, 480, 74

1. What is the GCF of 663, 852, 21?

Answer: GCF of 663, 852, 21 is 3.

2. How to Find the GCF of 663, 852, 21

Answer: Greatest Common Factor(GCF) of 663, 852, 21 = 3

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

Step 2: Then multiply all the prime factors GCF(663, 852, 21) = 3.