Greatest Common Factor of 28, 16, 645, 171

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

• Greatest Common Factor of 28, 16, 645, 171 by common division method
• Greatest Common Factor of 28, 16, 645, 171 with matching the biggest common factor

Maximum 4 Number can be enter but you can reset

∴ 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 16

List of positive integer factors of 16 that divides 16 without a remainder.

1,2,4,8,16

Factors of 645

List of positive integer factors of 645 that divides 645 without a remainder.

1,3,5,15,43,129,215,645

Factors of 171

List of positive integer factors of 171 that divides 171 without a remainder.

1,3,9,19,57,171

Greatest Common Factor

We found the factors 28,16,645,171 . The biggest common factor number is the GCF number.
So the greatest common factor 28,16,645,171 is 1.

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

• GCF of 14, 35, 523, 744
• GCF of 80, 19, 354, 243
• GCF of 61, 29, 493, 562
• GCF of 91, 32, 902, 891
• GCF of 54, 42, 111, 687

1. What is the GCF of 28, 16, 645, 171?

Answer: GCF of 28, 16, 645, 171 is 1.

2. How to Find the GCF of 28, 16, 645, 171

Answer: Greatest Common Factor(GCF) of 28, 16, 645, 171 = 1

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

Step 2: Then multiply all the prime factors GCF(28, 16, 645, 171) = 1.