Greatest Common Factor of 645, 165, 78

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

• Greatest Common Factor of 645, 165, 78 by common division method
• Greatest Common Factor of 645, 165, 78 with matching the biggest common factor

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

Factors of 645

List of positive integer factors of 645 that divides 645 without a remainder.

1,3,5,15,43,129,215,645

Factors of 165

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

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

Factors of 78

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

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

Greatest Common Factor

We found the factors 645,165,78 . The biggest common factor number is the GCF number.
So the greatest common factor 645,165,78 is 3.

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

• GCF of 410, 146, 91
• GCF of 512, 944, 73
• GCF of 698, 573, 67
• GCF of 414, 940, 46
• GCF of 860, 597, 34

1. What is the GCF of 645, 165, 78?

Answer: GCF of 645, 165, 78 is 3.

2. How to Find the GCF of 645, 165, 78

Answer: Greatest Common Factor(GCF) of 645, 165, 78 = 3

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

Step 2: Then multiply all the prime factors GCF(645, 165, 78) = 3.