Greatest Common Factor of 42, 68, 28, 20, 64

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

• Greatest Common Factor of 42, 68, 28, 20, 64 by common division method
• Greatest Common Factor of 42, 68, 28, 20, 64 with matching the biggest common factor

Maximum 4 Number can be enter but you can reset

∴ So the GCF of the given numbers is 2 = 2

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 68

List of positive integer factors of 68 that divides 68 without a remainder.

1,2,4,17,34,68

Factors of 28

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

1,2,4,7,14,28

Factors of 20

List of positive integer factors of 20 that divides 20 without a remainder.

1,2,4,5,10,20

Factors of 64

List of positive integer factors of 64 that divides 64 without a remainder.

1,2,4,8,16,32,64

Greatest Common Factor

We found the factors 42,68,28,20,64 . The biggest common factor number is the GCF number.
So the greatest common factor 42,68,28,20,64 is 2.

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

• GCF of 84, 68, 33, 79, 13
• GCF of 93, 71, 93, 88, 58
• GCF of 67, 21, 56, 78, 98
• GCF of 25, 99, 89, 24, 65
• GCF of 62, 97, 74, 42, 52

1. What is the GCF of 42, 68, 28, 20, 64?

Answer: GCF of 42, 68, 28, 20, 64 is 2.

2. How to Find the GCF of 42, 68, 28, 20, 64

Answer: Greatest Common Factor(GCF) of 42, 68, 28, 20, 64 = 2

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

Step 2: Then multiply all the prime factors GCF(42, 68, 28, 20, 64) = 2.