Greatest Common Factor of 28, 17, 15, 1, 99

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

• Greatest Common Factor of 28, 17, 15, 1, 99 by common division method
• Greatest Common Factor of 28, 17, 15, 1, 99 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 17

List of positive integer factors of 17 that divides 17 without a remainder.

1,17

Factors of 15

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

1,3,5,15

Factors of 1

List of positive integer factors of 1 that divides 1 without a remainder.

1

Factors of 99

List of positive integer factors of 99 that divides 99 without a remainder.

1,3,9,11,33,99

Greatest Common Factor

We found the factors 28,17,15,1,99 . The biggest common factor number is the GCF number.
So the greatest common factor 28,17,15,1,99 is 1.

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

• GCF of 14, 42, 14, 6, 53
• GCF of 74, 13, 50, 1, 59
• GCF of 63, 10, 63, 5, 53
• GCF of 28, 64, 31, 4, 48
• GCF of 45, 88, 26, 3, 43

1. What is the GCF of 28, 17, 15, 1, 99?

Answer: GCF of 28, 17, 15, 1, 99 is 1.

2. How to Find the GCF of 28, 17, 15, 1, 99

Answer: Greatest Common Factor(GCF) of 28, 17, 15, 1, 99 = 1

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

Step 2: Then multiply all the prime factors GCF(28, 17, 15, 1, 99) = 1.