Common Factors Calculator

Basic Calculator

Find the Common Factors of:
enter whole numbers separated by commas

Answer:

The common factors are:
1, 2, 4, 8

The Greatest Common Factor:
GCF = 8

Solution

The factors of 16 are:
1, 2, 4, 8, 16

The factors of 24 are:
1, 2, 3, 4, 6, 8, 12, 24

The factors of 64 are:
1, 2, 4, 8, 16, 32, 64

The factors of 136 are:
1, 2, 4, 8, 17, 34, 68, 136

The common factors are:
1, 2, 4, 8

The Greatest Common Factor:
GCF = 8

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Calculator Use

This calculator factors a set of positive integers to find the common factors (common divisors) of those integers. Enter the set of numbers you want to factor separating them with commas. Click "Calculate" to see all factors of each number as well as the greatest common factor (GCF).

The factors of a number include all divisors of that number. The factors of 12, for example, are 1, 2, 3, 4, 6 and 12. You can divide 12 by any of these numbers and obtain another whole integer number.

Common factors are factors (divisors) that are in common among a set of numbers. Consider the factors of 27, 54, and 81:

Number

Factors

1, 3, 9, 27

1, 2, 3, 6, 9, 18, 27, 54

1, 3, 9, 27, 81

Each of the numbers can be divided by 1, 3, 9, and 27, so you can say that these numbers are common factors of the set of numbers 27, 54, and 81. The largest of the common factors is 27, so you can say that 27 is the greatest common factor of 27, 54, and 81.

See the Factoring Calculator to learn more about finding the factors of a single integer number.