Greatest Common Factor of 129, 816, 21

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

• Greatest Common Factor of 129, 816, 21 by common division method
• Greatest Common Factor of 129, 816, 21 with matching the biggest common factor

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

Factors of 129

List of positive integer factors of 129 that divides 129 without a remainder.

1,3,43,129

Factors of 816

List of positive integer factors of 816 that divides 816 without a remainder.

1,2,3,4,6,8,12,16,17,24,34,48,51,68,102,136,204,272,408,816

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 129,816,21 . The biggest common factor number is the GCF number.
So the greatest common factor 129,816,21 is 3.

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

• GCF of 881, 382, 90
• GCF of 165, 903, 85
• GCF of 911, 647, 42
• GCF of 281, 714, 81
• GCF of 380, 527, 68

1. What is the GCF of 129, 816, 21?

Answer: GCF of 129, 816, 21 is 3.

2. How to Find the GCF of 129, 816, 21

Answer: Greatest Common Factor(GCF) of 129, 816, 21 = 3

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

Step 2: Then multiply all the prime factors GCF(129, 816, 21) = 3.