Greatest Common Factor of 21, 65, 42, 43, 807

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

• Greatest Common Factor of 21, 65, 42, 43, 807 by common division method
• Greatest Common Factor of 21, 65, 42, 43, 807 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 42

List of positive integer factors of 42 that divides 42 without a remainder.

1,2,3,6,7,14,21,42

Factors of 43

List of positive integer factors of 43 that divides 43 without a remainder.

1,43

Factors of 807

List of positive integer factors of 807 that divides 807 without a remainder.

1,3,269,807

Greatest Common Factor

We found the factors 21,65,42,43,807 . The biggest common factor number is the GCF number.
So the greatest common factor 21,65,42,43,807 is 1.

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

• GCF of 10, 42, 40, 29, 226
• GCF of 42, 39, 31, 78, 908
• GCF of 59, 56, 21, 40, 320
• GCF of 39, 33, 62, 21, 243
• GCF of 24, 27, 95, 36, 671

1. What is the GCF of 21, 65, 42, 43, 807?

Answer: GCF of 21, 65, 42, 43, 807 is 1.

2. How to Find the GCF of 21, 65, 42, 43, 807

Answer: Greatest Common Factor(GCF) of 21, 65, 42, 43, 807 = 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, 42, 43, 807) = 1.