Greatest Common Factor of 42, 12, 91, 320

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

• Greatest Common Factor of 42, 12, 91, 320 by common division method
• Greatest Common Factor of 42, 12, 91, 320 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 91

List of positive integer factors of 91 that divides 91 without a remainder.

1,7,13,91

Factors of 320

List of positive integer factors of 320 that divides 320 without a remainder.

1,2,4,5,8,10,16,20,32,40,64,80,160,320

Greatest Common Factor

We found the factors 42,12,91,320 . The biggest common factor number is the GCF number.
So the greatest common factor 42,12,91,320 is 1.

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

• GCF of 34, 43, 94, 782
• GCF of 72, 14, 90, 453
• GCF of 84, 76, 16, 707
• GCF of 40, 90, 25, 399
• GCF of 72, 21, 61, 460

1. What is the GCF of 42, 12, 91, 320?

Answer: GCF of 42, 12, 91, 320 is 1.

2. How to Find the GCF of 42, 12, 91, 320

Answer: Greatest Common Factor(GCF) of 42, 12, 91, 320 = 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, 91, 320) = 1.