Greatest Common Factor of 42, 21, 13, 865

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

• Greatest Common Factor of 42, 21, 13, 865 by common division method
• Greatest Common Factor of 42, 21, 13, 865 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 42

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

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

Factors of 21

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

1,3,7,21

Factors of 13

List of positive integer factors of 13 that divides 13 without a remainder.

1,13

Factors of 865

List of positive integer factors of 865 that divides 865 without a remainder.

1,5,173,865

Greatest Common Factor

We found the factors 42,21,13,865 . The biggest common factor number is the GCF number.
So the greatest common factor 42,21,13,865 is 1.

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

• GCF of 44, 20, 77, 622
• GCF of 49, 15, 24, 596
• GCF of 45, 58, 27, 716
• GCF of 54, 77, 34, 251
• GCF of 50, 59, 68, 736

1. What is the GCF of 42, 21, 13, 865?

Answer: GCF of 42, 21, 13, 865 is 1.

2. How to Find the GCF of 42, 21, 13, 865

Answer: Greatest Common Factor(GCF) of 42, 21, 13, 865 = 1

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

Step 2: Then multiply all the prime factors GCF(42, 21, 13, 865) = 1.