Greatest Common Factor of 81, 21, 72, 163

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

• Greatest Common Factor of 81, 21, 72, 163 by common division method
• Greatest Common Factor of 81, 21, 72, 163 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 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

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 163

List of positive integer factors of 163 that divides 163 without a remainder.

1,163

Greatest Common Factor

We found the factors 81,21,72,163 . The biggest common factor number is the GCF number.
So the greatest common factor 81,21,72,163 is 1.

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

• GCF of 38, 36, 76, 326
• GCF of 13, 80, 24, 681
• GCF of 94, 76, 25, 184
• GCF of 26, 98, 56, 597
• GCF of 24, 22, 91, 239

1. What is the GCF of 81, 21, 72, 163?

Answer: GCF of 81, 21, 72, 163 is 1.

2. How to Find the GCF of 81, 21, 72, 163

Answer: Greatest Common Factor(GCF) of 81, 21, 72, 163 = 1

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

Step 2: Then multiply all the prime factors GCF(81, 21, 72, 163) = 1.