# LCM

Returns the least common multiple of integers. The least common multiple is the smallest positive integer that is a multiple of all integer arguments number1, number2, and so on. Use LCM to add fractions with different denominators.

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

LCM(number1,number2, ...)

Number1, number2,...     are 1 to 29 values for which you want the least common multiple. If value is not an integer, it is truncated.

Remarks

• If any argument is nonnumeric, LCM returns the #VALUE! error value.
• If any argument is less than zero, LCM returns the #NUM! error value.

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)
=LCM(5, 2) Least common multiple of 5 and 2 (10)
=LCM(24, 36) Least common multiple of 24 and 36 (72)

Applies to:
Excel 2003