Greatest Common Factor of 91, 21, 16, 915

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

• Greatest Common Factor of 91, 21, 16, 915 by common division method
• Greatest Common Factor of 91, 21, 16, 915 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 91

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

1,7,13,91

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 915

List of positive integer factors of 915 that divides 915 without a remainder.

1,3,5,15,61,183,305,915

Greatest Common Factor

We found the factors 91,21,16,915 . The biggest common factor number is the GCF number.
So the greatest common factor 91,21,16,915 is 1.

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

• GCF of 12, 87, 33, 882
• GCF of 38, 17, 51, 693
• GCF of 94, 34, 63, 606
• GCF of 14, 18, 34, 643
• GCF of 17, 71, 47, 696

1. What is the GCF of 91, 21, 16, 915?

Answer: GCF of 91, 21, 16, 915 is 1.

2. How to Find the GCF of 91, 21, 16, 915

Answer: Greatest Common Factor(GCF) of 91, 21, 16, 915 = 1

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

Step 2: Then multiply all the prime factors GCF(91, 21, 16, 915) = 1.