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Common factorsWhat are factors?

A factor is a number that divides into another number exactly. A common factor is a number that two numbers can both divide into exactly. The highest common factor is the largest number that divide into two numbers exactly.

Part of MathsMultiples, factors and primes

What are factors?

  • The factors of a number are any numbers that divide into it exactly.

For example:

The factors of \({6}\) are \({1}\), \({2}\), \({3}\) and \({6}\).

The factors of \({10}\) are \({1}\), \({2}\), \({5}\) and \({10}\).

The factors of \({11}\) are \({1}\) and \({11}\) (so \({11}\) is a ).

Question

What are the factors of the following numbers?

  1. \(27\)
  2. \(16\)
  3. \(40\)

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Factor pairs

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