Greatest Common Factor of 81, 55, 72, 210

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

• Greatest Common Factor of 81, 55, 72, 210 by common division method
• Greatest Common Factor of 81, 55, 72, 210 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 55

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

1,5,11,55

Factors of 72

List of positive integer factors of 72 that divides 72 without a remainder.

1,2,3,4,6,8,9,12,18,24,36,72

Factors of 210

List of positive integer factors of 210 that divides 210 without a remainder.

1,2,3,5,6,7,10,14,15,21,30,35,42,70,105,210

Greatest Common Factor

We found the factors 81,55,72,210 . The biggest common factor number is the GCF number.
So the greatest common factor 81,55,72,210 is 1.

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

• GCF of 24, 70, 15, 690
• GCF of 60, 94, 47, 847
• GCF of 97, 40, 44, 976
• GCF of 73, 25, 99, 877
• GCF of 48, 22, 25, 157

1. What is the GCF of 81, 55, 72, 210?

Answer: GCF of 81, 55, 72, 210 is 1.

2. How to Find the GCF of 81, 55, 72, 210

Answer: Greatest Common Factor(GCF) of 81, 55, 72, 210 = 1

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

Step 2: Then multiply all the prime factors GCF(81, 55, 72, 210) = 1.