Greatest Common Factor of 12, 16, 78, 42, 165

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

• Greatest Common Factor of 12, 16, 78, 42, 165 by common division method
• Greatest Common Factor of 12, 16, 78, 42, 165 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 12

List of positive integer factors of 12 that divides 12 without a remainder.

1,2,3,4,6,12

Factors of 16

List of positive integer factors of 16 that divides 16 without a remainder.

1,2,4,8,16

Factors of 78

List of positive integer factors of 78 that divides 78 without a remainder.

1,2,3,6,13,26,39,78

Factors of 42

List of positive integer factors of 42 that divides 42 without a remainder.

1,2,3,6,7,14,21,42

Factors of 165

List of positive integer factors of 165 that divides 165 without a remainder.

1,3,5,11,15,33,55,165

Greatest Common Factor

We found the factors 12,16,78,42,165 . The biggest common factor number is the GCF number.
So the greatest common factor 12,16,78,42,165 is 1.

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

• GCF of 90, 41, 14, 43, 263
• GCF of 93, 35, 83, 85, 501
• GCF of 89, 46, 99, 20, 126
• GCF of 88, 13, 12, 95, 753
• GCF of 25, 75, 84, 48, 640

1. What is the GCF of 12, 16, 78, 42, 165?

Answer: GCF of 12, 16, 78, 42, 165 is 1.

2. How to Find the GCF of 12, 16, 78, 42, 165

Answer: Greatest Common Factor(GCF) of 12, 16, 78, 42, 165 = 1

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

Step 2: Then multiply all the prime factors GCF(12, 16, 78, 42, 165) = 1.