Common Factors Calculator

Quickly find every common factor shared by two or more integers. Paste numbers using your locale’s digit-grouping (commas, spaces, periods) and get instant, accurate results. Free to use on any device.

Number Format

Select the number format you are comfortable with.

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How to calculate the common factors?

To calculate the common factors of two or more numbers, follow these steps:

  1. Write down the factors of each number.
  2. Identify the factors that are common to both (or all) numbers.
  3. List the common factors.
  4. Find the greatest common factor if necessary.