Greatest Common Factor of 42, 12, 77, 980

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

• Greatest Common Factor of 42, 12, 77, 980 by common division method
• Greatest Common Factor of 42, 12, 77, 980 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 12

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

1,2,3,4,6,12

Factors of 77

List of positive integer factors of 77 that divides 77 without a remainder.

1,7,11,77

Factors of 980

List of positive integer factors of 980 that divides 980 without a remainder.

1,2,4,5,7,10,14,20,28,35,49,70,98,140,196,245,490,980

Greatest Common Factor

We found the factors 42,12,77,980 . The biggest common factor number is the GCF number.
So the greatest common factor 42,12,77,980 is 1.

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

• GCF of 55, 88, 10, 754
• GCF of 84, 47, 41, 405
• GCF of 55, 99, 19, 945
• GCF of 52, 53, 80, 100
• GCF of 60, 33, 21, 178

1. What is the GCF of 42, 12, 77, 980?

Answer: GCF of 42, 12, 77, 980 is 1.

2. How to Find the GCF of 42, 12, 77, 980

Answer: Greatest Common Factor(GCF) of 42, 12, 77, 980 = 1

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

Step 2: Then multiply all the prime factors GCF(42, 12, 77, 980) = 1.