Greatest Common Factor of 81, 21, 44, 980

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

• Greatest Common Factor of 81, 21, 44, 980 by common division method
• Greatest Common Factor of 81, 21, 44, 980 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 44

List of positive integer factors of 44 that divides 44 without a remainder.

1,2,4,11,22,44

Factors of 980

List of positive integer factors of 980 that divides 980 without a remainder.

1,2,4,5,7,10,14,20,28,35,49,70,98,140,196,245,490,980

Greatest Common Factor

We found the factors 81,21,44,980 . The biggest common factor number is the GCF number.
So the greatest common factor 81,21,44,980 is 1.

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

• GCF of 99, 55, 98, 518
• GCF of 94, 80, 50, 301
• GCF of 13, 65, 40, 552
• GCF of 78, 38, 28, 647
• GCF of 31, 72, 86, 153

1. What is the GCF of 81, 21, 44, 980?

Answer: GCF of 81, 21, 44, 980 is 1.

2. How to Find the GCF of 81, 21, 44, 980

Answer: Greatest Common Factor(GCF) of 81, 21, 44, 980 = 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, 44, 980) = 1.