Greatest Common Factor of 42, 40, 28, 23

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

• Greatest Common Factor of 42, 40, 28, 23 by common division method
• Greatest Common Factor of 42, 40, 28, 23 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 40

List of positive integer factors of 40 that divides 40 without a remainder.

1,2,4,5,8,10,20,40

Factors of 28

List of positive integer factors of 28 that divides 28 without a remainder.

1,2,4,7,14,28

Factors of 23

List of positive integer factors of 23 that divides 23 without a remainder.

1,23

Greatest Common Factor

We found the factors 42,40,28,23 . The biggest common factor number is the GCF number.
So the greatest common factor 42,40,28,23 is 1.

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

• GCF of 28, 28, 93, 70
• GCF of 77, 85, 74, 97
• GCF of 99, 26, 67, 33
• GCF of 76, 91, 26, 78
• GCF of 78, 72, 91, 12

1. What is the GCF of 42, 40, 28, 23?

Answer: GCF of 42, 40, 28, 23 is 1.

2. How to Find the GCF of 42, 40, 28, 23

Answer: Greatest Common Factor(GCF) of 42, 40, 28, 23 = 1

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

Step 2: Then multiply all the prime factors GCF(42, 40, 28, 23) = 1.