Greatest Common Factor of 21, 65, 49, 353

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

• Greatest Common Factor of 21, 65, 49, 353 by common division method
• Greatest Common Factor of 21, 65, 49, 353 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 65

List of positive integer factors of 65 that divides 65 without a remainder.

1,5,13,65

Factors of 49

List of positive integer factors of 49 that divides 49 without a remainder.

1,7,49

Factors of 353

List of positive integer factors of 353 that divides 353 without a remainder.

1,353

Greatest Common Factor

We found the factors 21,65,49,353 . The biggest common factor number is the GCF number.
So the greatest common factor 21,65,49,353 is 1.

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

• GCF of 95, 51, 86, 817
• GCF of 20, 71, 15, 433
• GCF of 55, 67, 21, 193
• GCF of 68, 73, 43, 146
• GCF of 64, 92, 26, 117

1. What is the GCF of 21, 65, 49, 353?

Answer: GCF of 21, 65, 49, 353 is 1.

2. How to Find the GCF of 21, 65, 49, 353

Answer: Greatest Common Factor(GCF) of 21, 65, 49, 353 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 65, 49, 353) = 1.