Greatest Common Factor of 42, 79, 13, 720

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

• Greatest Common Factor of 42, 79, 13, 720 by common division method
• Greatest Common Factor of 42, 79, 13, 720 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 79

List of positive integer factors of 79 that divides 79 without a remainder.

1,79

Factors of 13

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

1,13

Factors of 720

List of positive integer factors of 720 that divides 720 without a remainder.

1,2,3,4,5,6,8,9,10,12,15,16,18,20,24,30,36,40,45,48,60,72,80,90,120,144,180,240,360,720

Greatest Common Factor

We found the factors 42,79,13,720 . The biggest common factor number is the GCF number.
So the greatest common factor 42,79,13,720 is 1.

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

• GCF of 31, 33, 51, 243
• GCF of 48, 21, 76, 977
• GCF of 51, 67, 12, 903
• GCF of 49, 99, 50, 675
• GCF of 54, 12, 83, 257

1. What is the GCF of 42, 79, 13, 720?

Answer: GCF of 42, 79, 13, 720 is 1.

2. How to Find the GCF of 42, 79, 13, 720

Answer: Greatest Common Factor(GCF) of 42, 79, 13, 720 = 1

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

Step 2: Then multiply all the prime factors GCF(42, 79, 13, 720) = 1.