Greatest Common Factor of 42, 80, 85, 280

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

• Greatest Common Factor of 42, 80, 85, 280 by common division method
• Greatest Common Factor of 42, 80, 85, 280 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 42

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

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

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 85

List of positive integer factors of 85 that divides 85 without a remainder.

1,5,17,85

Factors of 280

List of positive integer factors of 280 that divides 280 without a remainder.

1,2,4,5,7,8,10,14,20,28,35,40,56,70,140,280

Greatest Common Factor

We found the factors 42,80,85,280 . The biggest common factor number is the GCF number.
So the greatest common factor 42,80,85,280 is 1.

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

• GCF of 33, 58, 81, 438
• GCF of 12, 61, 18, 933
• GCF of 72, 96, 53, 135
• GCF of 24, 94, 14, 735
• GCF of 65, 69, 91, 758

1. What is the GCF of 42, 80, 85, 280?

Answer: GCF of 42, 80, 85, 280 is 1.

2. How to Find the GCF of 42, 80, 85, 280

Answer: Greatest Common Factor(GCF) of 42, 80, 85, 280 = 1

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

Step 2: Then multiply all the prime factors GCF(42, 80, 85, 280) = 1.