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# What is the greatest common factor of 4, 8 and 15?

To use the GCD / GCF / HCF Calculator below just enter a set of numbers separated by commas (,).

### Greatest Common Factor Calculator / Converter

You have reached us maybe looking for answers to the questions like: What is the greatest common factor of 4, 8 and 15? or what is the highest common factor (HCF) of 4, 8 and 15?

## What is the GCF of 4, 8 and 15?

The first step to find the gcf of 4, 8 and 15 is to list the factors of each number. The factors of 4 are 1, 2 and 4. The factors of 8 are 1, 2, 4 and 8. The factors of 15 are 1, 3, 5 and 15. So, the Greatest Common Factor for these numbers is 1 because it divides all them without a remainder. Read more about Common Factors below.

## How to find the Greatest Common Factor

### GCF example:

The first step is to find all divisors of each number. For instance, let us find the gcf(4,8,15).

In this case we have:

• The factors of 4 (all the whole numbers that can divide the number without a remainder) are 1, 2 and 4;
• The factors of 8 are 1, 2, 4 and 8;
• The factors of 15 are 1, 3, 5 and 15.

The second step is to analyze which are the common divisors. It is not difficult to see that the 'Greatest Common Factor' or 'Divisor' for 4, 8 and 15 is 1. The GCF is the largest common positive integer that divides all the numbers (4,8,15) without a remainder.

The GCF is also known as:

• Greatest common divisor (gcd);
• Highest common factor (hcf);
• Greatest common measure (gcm), or
• Highest common divisor

### Greatest Common Factor Calculator 