Greatest Common Factor of 81, 15, 63, 217

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

• Greatest Common Factor of 81, 15, 63, 217 by common division method
• Greatest Common Factor of 81, 15, 63, 217 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 81

List of positive integer factors of 81 that divides 81 without a remainder.

1,3,9,27,81

Factors of 15

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

1,3,5,15

Factors of 63

List of positive integer factors of 63 that divides 63 without a remainder.

1,3,7,9,21,63

Factors of 217

List of positive integer factors of 217 that divides 217 without a remainder.

1,7,31,217

Greatest Common Factor

We found the factors 81,15,63,217 . The biggest common factor number is the GCF number.
So the greatest common factor 81,15,63,217 is 1.

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

• GCF of 16, 75, 72, 717
• GCF of 20, 64, 99, 945
• GCF of 76, 54, 38, 636
• GCF of 94, 65, 77, 359
• GCF of 50, 77, 28, 844

1. What is the GCF of 81, 15, 63, 217?

Answer: GCF of 81, 15, 63, 217 is 1.

2. How to Find the GCF of 81, 15, 63, 217

Answer: Greatest Common Factor(GCF) of 81, 15, 63, 217 = 1

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

Step 2: Then multiply all the prime factors GCF(81, 15, 63, 217) = 1.