Greatest Common Factor of 1, 21, 91, 53

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

• Greatest Common Factor of 1, 21, 91, 53 by common division method
• Greatest Common Factor of 1, 21, 91, 53 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 1

List of positive integer factors of 1 that divides 1 without a remainder.

1

Factors of 21

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

1,3,7,21

Factors of 91

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

1,7,13,91

Factors of 53

List of positive integer factors of 53 that divides 53 without a remainder.

1,53

Greatest Common Factor

We found the factors 1,21,91,53 . The biggest common factor number is the GCF number.
So the greatest common factor 1,21,91,53 is 1.

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

• GCF of 1, 44, 22, 95
• GCF of 6, 93, 57, 22
• GCF of 5, 34, 68, 99
• GCF of 8, 73, 22, 95
• GCF of 6, 48, 81, 24

1. What is the GCF of 1, 21, 91, 53?

Answer: GCF of 1, 21, 91, 53 is 1.

2. How to Find the GCF of 1, 21, 91, 53

Answer: Greatest Common Factor(GCF) of 1, 21, 91, 53 = 1

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

Step 2: Then multiply all the prime factors GCF(1, 21, 91, 53) = 1.