Greatest Common Factor of 42, 72, 4, 15

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

• Greatest Common Factor of 42, 72, 4, 15 by common division method
• Greatest Common Factor of 42, 72, 4, 15 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 72

List of positive integer factors of 72 that divides 72 without a remainder.

1,2,3,4,6,8,9,12,18,24,36,72

Factors of 4

List of positive integer factors of 4 that divides 4 without a remainder.

1,2,4

Factors of 15

List of positive integer factors of 15 that divides 15 without a remainder.

1,3,5,15

Greatest Common Factor

We found the factors 42,72,4,15 . The biggest common factor number is the GCF number.
So the greatest common factor 42,72,4,15 is 1.

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

• GCF of 89, 19, 4, 58
• GCF of 17, 83, 5, 97
• GCF of 59, 21, 8, 41
• GCF of 96, 24, 4, 83
• GCF of 76, 61, 9, 89

1. What is the GCF of 42, 72, 4, 15?

Answer: GCF of 42, 72, 4, 15 is 1.

2. How to Find the GCF of 42, 72, 4, 15

Answer: Greatest Common Factor(GCF) of 42, 72, 4, 15 = 1

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

Step 2: Then multiply all the prime factors GCF(42, 72, 4, 15) = 1.