Q: What are the factor combinations of the number 787,293?

 A:
Positive:   1 x 7872933 x 2624319 x 8747713 x 6056127 x 2915939 x 20187117 x 6729351 x 2243
Negative: -1 x -787293-3 x -262431-9 x -87477-13 x -60561-27 x -29159-39 x -20187-117 x -6729-351 x -2243


How do I find the factor combinations of the number 787,293?

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 787,293, 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.

1 787,293
-1 -787,293

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 787,293.

Example:
1 x 787,293 = 787,293
and
-1 x -787,293 = 787,293
Notice both answers equal 787,293

With that explanation out of the way, let's continue. Next, we take the number 787,293 and divide it by 2:

787,293 ÷ 2 = 393,646.5

If the quotient is a whole number, then 2 and 393,646.5 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:

1 787,293
-1 -787,293

Now, we try dividing 787,293 by 3:

787,293 ÷ 3 = 262,431

If the quotient is a whole number, then 3 and 262,431 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 3 262,431 787,293
-1 -3 -262,431 -787,293

Let's try dividing by 4:

787,293 ÷ 4 = 196,823.25

If the quotient is a whole number, then 4 and 196,823.25 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 3 262,431 787,293
-1 -3 -262,431 787,293
Keep dividing by the next highest number until you cannot divide anymore.

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

1391327391173512,2436,72920,18729,15960,56187,477262,431787,293
-1-3-9-13-27-39-117-351-2,243-6,729-20,187-29,159-60,561-87,477-262,431-787,293

More Examples

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