Greatest Common Factor of 21, 98, 85, 8

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

• Greatest Common Factor of 21, 98, 85, 8 by common division method
• Greatest Common Factor of 21, 98, 85, 8 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 21

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

1,3,7,21

Factors of 98

List of positive integer factors of 98 that divides 98 without a remainder.

1,2,7,14,49,98

Factors of 85

List of positive integer factors of 85 that divides 85 without a remainder.

1,5,17,85

Factors of 8

List of positive integer factors of 8 that divides 8 without a remainder.

1,2,4,8

Greatest Common Factor

We found the factors 21,98,85,8 . The biggest common factor number is the GCF number.
So the greatest common factor 21,98,85,8 is 1.

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

• GCF of 68, 18, 62, 7
• GCF of 44, 84, 91, 8
• GCF of 12, 83, 16, 5
• GCF of 31, 30, 45, 8
• GCF of 61, 88, 59, 6

1. What is the GCF of 21, 98, 85, 8?

Answer: GCF of 21, 98, 85, 8 is 1.

2. How to Find the GCF of 21, 98, 85, 8

Answer: Greatest Common Factor(GCF) of 21, 98, 85, 8 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 98, 85, 8) = 1.