Greatest Common Factor of 15, 69, 80, 660

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

• Greatest Common Factor of 15, 69, 80, 660 by common division method
• Greatest Common Factor of 15, 69, 80, 660 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 69

List of positive integer factors of 69 that divides 69 without a remainder.

1,3,23,69

Factors of 80

List of positive integer factors of 80 that divides 80 without a remainder.

1,2,4,5,8,10,16,20,40,80

Factors of 660

List of positive integer factors of 660 that divides 660 without a remainder.

1,2,3,4,5,6,10,11,12,15,20,22,30,33,44,55,60,66,110,132,165,220,330,660

Greatest Common Factor

We found the factors 15,69,80,660 . The biggest common factor number is the GCF number.
So the greatest common factor 15,69,80,660 is 1.

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

• GCF of 65, 53, 86, 969
• GCF of 79, 20, 82, 406
• GCF of 29, 88, 43, 409
• GCF of 28, 33, 17, 367
• GCF of 58, 55, 30, 152

1. What is the GCF of 15, 69, 80, 660?

Answer: GCF of 15, 69, 80, 660 is 1.

2. How to Find the GCF of 15, 69, 80, 660

Answer: Greatest Common Factor(GCF) of 15, 69, 80, 660 = 1

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

Step 2: Then multiply all the prime factors GCF(15, 69, 80, 660) = 1.