# GCD

Returns the greatest common divisor of two or more integers. The greatest common divisor is the largest integer that divides both number1 and number2 without a remainder.

If this function is not available, and returns the #NAME? error, install and load the Analysis ToolPak add-in.

2. In the Add-Ins available list, select the Analysis ToolPak box, and then click OK.
3. If necessary, follow the instructions in the setup program.

Syntax

GCD(number1,number2, ...)

Number1, number2, ...     are 1 to 29 values. If any value is not an integer, it is truncated.

Remarks

• If any argument is nonnumeric, GCD returns the #VALUE! error value.
• If any argument is less than zero, GCD returns the #NUM! error value.
• One divides any value evenly.
• A prime number has only itself and one as even divisors.

Example

The example may be easier to understand if you copy it to a blank worksheet.

1. Create a blank workbook or worksheet.
2. Select the example in the Help topic.

Note   Do not select the row or column headers.

Selecting an example from Help
1. Press CTRL+C.
2. In the worksheet, select cell A1, and press CTRL+V.
3. To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Formulas tab, in the Formula Auditing group, click the Show Formulas button.
A B
Formula Description (Result)
=GCD(5, 2) Greatest common divisor of 5 and 2 (1)
=GCD(24, 36) Greatest common divisor of 24 and 36 (12)
=GCD(7, 1) Greatest common divisor of 7 and 1 (1)
=GCD(5, 0) Greatest common divisor of 5 and 0 (5)

Applies to:
Excel 2003