Greatest Common Factor of 28, 15, 55, 387

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

• Greatest Common Factor of 28, 15, 55, 387 by common division method
• Greatest Common Factor of 28, 15, 55, 387 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 15

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

1,3,5,15

Factors of 55

List of positive integer factors of 55 that divides 55 without a remainder.

1,5,11,55

Factors of 387

List of positive integer factors of 387 that divides 387 without a remainder.

1,3,9,43,129,387

Greatest Common Factor

We found the factors 28,15,55,387 . The biggest common factor number is the GCF number.
So the greatest common factor 28,15,55,387 is 1.

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

• GCF of 89, 63, 68, 448
• GCF of 48, 57, 51, 552
• GCF of 99, 60, 20, 620
• GCF of 32, 97, 64, 693
• GCF of 74, 25, 18, 213

1. What is the GCF of 28, 15, 55, 387?

Answer: GCF of 28, 15, 55, 387 is 1.

2. How to Find the GCF of 28, 15, 55, 387

Answer: Greatest Common Factor(GCF) of 28, 15, 55, 387 = 1

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

Step 2: Then multiply all the prime factors GCF(28, 15, 55, 387) = 1.