Greatest Common Factor of 15, 81, 28, 74

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

• Greatest Common Factor of 15, 81, 28, 74 by common division method
• Greatest Common Factor of 15, 81, 28, 74 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 15

List of positive integer factors of 15 that divides 15 without a remainder.

1,3,5,15

Factors of 81

List of positive integer factors of 81 that divides 81 without a remainder.

1,3,9,27,81

Factors of 28

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

1,2,4,7,14,28

Factors of 74

List of positive integer factors of 74 that divides 74 without a remainder.

1,2,37,74

Greatest Common Factor

We found the factors 15,81,28,74 . The biggest common factor number is the GCF number.
So the greatest common factor 15,81,28,74 is 1.

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

• GCF of 68, 80, 66, 33
• GCF of 65, 59, 40, 87
• GCF of 77, 33, 69, 67
• GCF of 69, 69, 18, 54
• GCF of 61, 94, 26, 21

1. What is the GCF of 15, 81, 28, 74?

Answer: GCF of 15, 81, 28, 74 is 1.

2. How to Find the GCF of 15, 81, 28, 74

Answer: Greatest Common Factor(GCF) of 15, 81, 28, 74 = 1

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

Step 2: Then multiply all the prime factors GCF(15, 81, 28, 74) = 1.