Greatest Common Factor of 80, 42, 642

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

• Greatest Common Factor of 80, 42, 642 by common division method
• Greatest Common Factor of 80, 42, 642 with matching the biggest common factor

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∴ So the GCF of the given numbers is 2 = 2

Factors of 80

List of positive integer factors of 80 that divides 80 without a remainder.

1,2,4,5,8,10,16,20,40,80

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 642

List of positive integer factors of 642 that divides 642 without a remainder.

1,2,3,6,107,214,321,642

Greatest Common Factor

We found the factors 80,42,642 . The biggest common factor number is the GCF number.
So the greatest common factor 80,42,642 is 2.

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

• GCF of 77, 98, 249
• GCF of 89, 45, 392
• GCF of 68, 84, 868
• GCF of 28, 57, 367
• GCF of 31, 17, 427

1. What is the GCF of 80, 42, 642?

Answer: GCF of 80, 42, 642 is 2.

2. How to Find the GCF of 80, 42, 642

Answer: Greatest Common Factor(GCF) of 80, 42, 642 = 2

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

Step 2: Then multiply all the prime factors GCF(80, 42, 642) = 2.