Greatest Common Factor of 21, 16, 86, 305

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

• Greatest Common Factor of 21, 16, 86, 305 by common division method
• Greatest Common Factor of 21, 16, 86, 305 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 16

List of positive integer factors of 16 that divides 16 without a remainder.

1,2,4,8,16

Factors of 86

List of positive integer factors of 86 that divides 86 without a remainder.

1,2,43,86

Factors of 305

List of positive integer factors of 305 that divides 305 without a remainder.

1,5,61,305

Greatest Common Factor

We found the factors 21,16,86,305 . The biggest common factor number is the GCF number.
So the greatest common factor 21,16,86,305 is 1.

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

• GCF of 68, 86, 79, 440
• GCF of 30, 61, 65, 527
• GCF of 26, 93, 20, 464
• GCF of 98, 74, 56, 615
• GCF of 74, 66, 99, 543

1. What is the GCF of 21, 16, 86, 305?

Answer: GCF of 21, 16, 86, 305 is 1.

2. How to Find the GCF of 21, 16, 86, 305

Answer: Greatest Common Factor(GCF) of 21, 16, 86, 305 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 16, 86, 305) = 1.