Q: What are the factor combinations of the number 987,384?

 A:
Positive:   1 x 9873842 x 4936923 x 3291284 x 2468466 x 1645648 x 12342312 x 8228224 x 41141
Negative: -1 x -987384-2 x -493692-3 x -329128-4 x -246846-6 x -164564-8 x -123423-12 x -82282-24 x -41141


How do I find the factor combinations of the number 987,384?

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 987,384, 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.

1 987,384
-1 -987,384

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 987,384.

Example:
1 x 987,384 = 987,384
and
-1 x -987,384 = 987,384
Notice both answers equal 987,384

With that explanation out of the way, let's continue. Next, we take the number 987,384 and divide it by 2:

987,384 ÷ 2 = 493,692

If the quotient is a whole number, then 2 and 493,692 are factors. In this case, the quotient is a whole number. Write them in the table inside the other two factors like the below example. Don't forget to write the negative numbers too!

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

1 2 493,692 987,384
-1 -2 -493,692 -987,384

Now, we try dividing 987,384 by 3:

987,384 ÷ 3 = 329,128

If the quotient is a whole number, then 3 and 329,128 are factors. In this case, the quotient is a whole number. Write them in the table inside the other two factors like the below example. Don't forget to write the negative numbers too!

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

1 2 3 329,128 493,692 987,384
-1 -2 -3 -329,128 -493,692 -987,384

Let's try dividing by 4:

987,384 ÷ 4 = 246,846

If the quotient is a whole number, then 4 and 246,846 are factors. In this case, the quotient is a whole number. Write them in the table inside the other two factors like the below example. Don't forget to write the negative numbers too!

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

1 2 3 4 246,846 329,128 493,692 987,384
-1 -2 -3 -4 -246,846 -329,128 -493,692 987,384
Keep dividing by the next highest number until you cannot divide anymore.

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

123468122441,14182,282123,423164,564246,846329,128493,692987,384
-1-2-3-4-6-8-12-24-41,141-82,282-123,423-164,564-246,846-329,128-493,692-987,384

More Examples

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