Greatest Common Factor of 28, 13, 90

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

• Greatest Common Factor of 28, 13, 90 by common division method
• Greatest Common Factor of 28, 13, 90 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 28

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

1,2,4,7,14,28

Factors of 13

List of positive integer factors of 13 that divides 13 without a remainder.

1,13

Factors of 90

List of positive integer factors of 90 that divides 90 without a remainder.

1,2,3,5,6,9,10,15,18,30,45,90

Greatest Common Factor

We found the factors 28,13,90 . The biggest common factor number is the GCF number.
So the greatest common factor 28,13,90 is 1.

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

• GCF of 72, 68, 50
• GCF of 12, 53, 89
• GCF of 99, 26, 61
• GCF of 69, 80, 57
• GCF of 57, 26, 32

1. What is the GCF of 28, 13, 90?

Answer: GCF of 28, 13, 90 is 1.

2. How to Find the GCF of 28, 13, 90

Answer: Greatest Common Factor(GCF) of 28, 13, 90 = 1

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

Step 2: Then multiply all the prime factors GCF(28, 13, 90) = 1.