Q: What are the factor combinations of the number 437?

 A:
Positive:   1 x 43719 x 23
Negative: -1 x -437-19 x -23


How do I find the factor combinations of the number 437?

Unfortunately, there's not simple formula to identifying all of the factors of a number and it can be a tedious process when trying to identify the divisors of larger numbers. To find the factor combinations of the number 437, it is easier to work with a table - it's called factoring from the outside in.

Outside in Factoring

We start by creating a table and writing 1 on the left side and then the number we're trying to find the factors for on the right side in a table. Then, below that, write the numbers as a negative as well.

1 437
-1 -437

Why are the negative numbers included?

When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 437.

Example:
1 x 437 = 437
and
-1 x -437 = 437
Notice both answers equal 437

With that explanation out of the way, let's continue. Next, we take the number 437 and divide it by 2:

437 ÷ 2 = 218.5

If the quotient is a whole number, then 2 and 218.5 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.

Here is what our table should look like at this step:

1 437
-1 -437

Now, we try dividing 437 by 3:

437 ÷ 3 = 145.6667

If the quotient is a whole number, then 3 and 145.6667 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.

Here is what our table should look like at this step:

1 437
-1 -437

Let's try dividing by 4:

437 ÷ 4 = 109.25

If the quotient is a whole number, then 4 and 109.25 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.

Here is what our table should look like at this step:

1 437
-1 437
Keep dividing by the next highest number until you cannot divide anymore.

If you did it right, you will end up with this table:

11923437
-1-19-23-437

More Examples

Here are some more numbers to try:

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