Greatest Common Factor of 78, 65, 42, 669

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

• Greatest Common Factor of 78, 65, 42, 669 by common division method
• Greatest Common Factor of 78, 65, 42, 669 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 78

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

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

Factors of 65

List of positive integer factors of 65 that divides 65 without a remainder.

1,5,13,65

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 669

List of positive integer factors of 669 that divides 669 without a remainder.

1,3,223,669

Greatest Common Factor

We found the factors 78,65,42,669 . The biggest common factor number is the GCF number.
So the greatest common factor 78,65,42,669 is 1.

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

• GCF of 80, 38, 80, 469
• GCF of 50, 80, 57, 360
• GCF of 73, 45, 46, 124
• GCF of 45, 91, 88, 143
• GCF of 68, 26, 40, 345

1. What is the GCF of 78, 65, 42, 669?

Answer: GCF of 78, 65, 42, 669 is 1.

2. How to Find the GCF of 78, 65, 42, 669

Answer: Greatest Common Factor(GCF) of 78, 65, 42, 669 = 1

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

Step 2: Then multiply all the prime factors GCF(78, 65, 42, 669) = 1.