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What Are the Factors of 40?

The factors of 40 are 1, 2, 4, 5, 8, 10, 20, 40.

Calcating the factors of 40 is straightforward. 40 and 1 are the easiest two factors to find.


  1. Try 1. 1 x 40 = 40, so put these into our factor list.
    1...40

  2. Take 2. 2 x 20 = 40, which means we add these to our factor list.
    12...2040

  3. Now take 3... no. 40/3 isn't a whole number. So we skip 3.

  4. Next try 4. 4 x 10 = 40, so we add these to our list of factors.
    124...102040

  5. Now try 5. 5 x 8 = 40, so put these into our factor list.
    1245...8102040

  6. Try 6... no good. 40/6 isn't a whole number. So we skip 6.

  7. Now, since we don't have any more numbers to try, we're done!
    12458102040


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Need help finding the factors of 40? It's easy! Here you go: the factors of 40 are 1, 2, 4, 5... | randytayler@gmail.com