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Arithmetic

LCM & GCF Calculator

List any collection of integers to instantly see their greatest common factor (GCF) and least common multiple (LCM).

lcmgcfdivisibility
LCM & GCF Calculator

Feed any list of integers to get the greatest common factor and least common multiple.

Total numbers
3
Greatest Common Factor
6
Least Common Multiple
360

Fundamental relationships

LCM(a, b) = |ab| ÷ GCD(a, b)

The calculator cleans the input list, computes the greatest common divisor across all numbers, then leverages the gcd-derived formula to produce the LCM.

How to use

  1. Type integers separated by commas, spaces, or new lines.
  2. The tool removes zeros, computes the GCF, and derives the LCM.
  3. Review the count of numbers processed to verify your input.

Example

Input: Numbers = 24, 60, 90

Output: Greatest common factor = 6, Least common multiple = 360

FAQ & notes

Can I include negative numbers?

Yes. The calculator uses the absolute value of each integer so signs do not impact GCF or LCM results.

What happens if I enter zero?

Zero is ignored because it would make both GCF and LCM undefined. Remove zeros or replace them with a meaningful value.