Greatest Common Factor of 42, 25, 12, 391

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

• Greatest Common Factor of 42, 25, 12, 391 by common division method
• Greatest Common Factor of 42, 25, 12, 391 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 25

List of positive integer factors of 25 that divides 25 without a remainder.

1,5,25

Factors of 12

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

1,2,3,4,6,12

Factors of 391

List of positive integer factors of 391 that divides 391 without a remainder.

1,17,23,391

Greatest Common Factor

We found the factors 42,25,12,391 . The biggest common factor number is the GCF number.
So the greatest common factor 42,25,12,391 is 1.

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

• GCF of 16, 13, 27, 794
• GCF of 91, 21, 61, 551
• GCF of 17, 23, 93, 715
• GCF of 60, 72, 41, 837
• GCF of 76, 67, 93, 760

1. What is the GCF of 42, 25, 12, 391?

Answer: GCF of 42, 25, 12, 391 is 1.

2. How to Find the GCF of 42, 25, 12, 391

Answer: Greatest Common Factor(GCF) of 42, 25, 12, 391 = 1

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

Step 2: Then multiply all the prime factors GCF(42, 25, 12, 391) = 1.