Greatest Common Factor of 17, 91, 86, 21

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

• Greatest Common Factor of 17, 91, 86, 21 by common division method
• Greatest Common Factor of 17, 91, 86, 21 with matching the biggest common factor

Maximum 4 Number can be enter but you can reset

∴ GCF of numbers is 1 because of no common factors present between them.

Factors of 17

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

1,17

Factors of 91

List of positive integer factors of 91 that divides 91 without a remainder.

1,7,13,91

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 17,91,86,21 . The biggest common factor number is the GCF number.
So the greatest common factor 17,91,86,21 is 1.

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

• GCF of 81, 99, 97, 52
• GCF of 81, 29, 64, 60
• GCF of 20, 31, 35, 36
• GCF of 25, 75, 61, 63
• GCF of 86, 14, 48, 69

1. What is the GCF of 17, 91, 86, 21?

Answer: GCF of 17, 91, 86, 21 is 1.

2. How to Find the GCF of 17, 91, 86, 21

Answer: Greatest Common Factor(GCF) of 17, 91, 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(17, 91, 86, 21) = 1.