Greatest Common Factor of 42, 21, 18, 931

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

• Greatest Common Factor of 42, 21, 18, 931 by common division method
• Greatest Common Factor of 42, 21, 18, 931 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 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

Factors of 18

List of positive integer factors of 18 that divides 18 without a remainder.

1,2,3,6,9,18

Factors of 931

List of positive integer factors of 931 that divides 931 without a remainder.

1,7,19,49,133,931

Greatest Common Factor

We found the factors 42,21,18,931 . The biggest common factor number is the GCF number.
So the greatest common factor 42,21,18,931 is 1.

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

• GCF of 66, 87, 83, 667
• GCF of 93, 20, 33, 177
• GCF of 95, 88, 56, 982
• GCF of 56, 91, 73, 979
• GCF of 81, 62, 47, 511

1. What is the GCF of 42, 21, 18, 931?

Answer: GCF of 42, 21, 18, 931 is 1.

2. How to Find the GCF of 42, 21, 18, 931

Answer: Greatest Common Factor(GCF) of 42, 21, 18, 931 = 1

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

Step 2: Then multiply all the prime factors GCF(42, 21, 18, 931) = 1.