Greatest Common Factor of 10, 17, 84, 86, 21

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

• Greatest Common Factor of 10, 17, 84, 86, 21 by common division method
• Greatest Common Factor of 10, 17, 84, 86, 21 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 10

List of positive integer factors of 10 that divides 10 without a remainder.

1,2,5,10

Factors of 17

List of positive integer factors of 17 that divides 17 without a remainder.

1,17

Factors of 84

List of positive integer factors of 84 that divides 84 without a remainder.

1,2,3,4,6,7,12,14,21,28,42,84

Factors of 86

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

1,2,43,86

Factors of 21

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

1,3,7,21

Greatest Common Factor

We found the factors 10,17,84,86,21 . The biggest common factor number is the GCF number.
So the greatest common factor 10,17,84,86,21 is 1.

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

• GCF of 38, 28, 60, 54, 61
• GCF of 14, 66, 18, 34, 23
• GCF of 20, 89, 20, 58, 11
• GCF of 35, 42, 83, 87, 94
• GCF of 63, 96, 14, 42, 99

1. What is the GCF of 10, 17, 84, 86, 21?

Answer: GCF of 10, 17, 84, 86, 21 is 1.

2. How to Find the GCF of 10, 17, 84, 86, 21

Answer: Greatest Common Factor(GCF) of 10, 17, 84, 86, 21 = 1

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

Step 2: Then multiply all the prime factors GCF(10, 17, 84, 86, 21) = 1.