Q: What are the factor combinations of the number 815,264?

 A:
Positive:   1 x 8152642 x 4076324 x 2038168 x 10190816 x 5095432 x 2547773 x 11168146 x 5584292 x 2792349 x 2336584 x 1396698 x 1168
Negative: -1 x -815264-2 x -407632-4 x -203816-8 x -101908-16 x -50954-32 x -25477-73 x -11168-146 x -5584-292 x -2792-349 x -2336-584 x -1396-698 x -1168


How do I find the factor combinations of the number 815,264?

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 815,264, 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.

1 815,264
-1 -815,264

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 815,264.

Example:
1 x 815,264 = 815,264
and
-1 x -815,264 = 815,264
Notice both answers equal 815,264

With that explanation out of the way, let's continue. Next, we take the number 815,264 and divide it by 2:

815,264 ÷ 2 = 407,632

If the quotient is a whole number, then 2 and 407,632 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 2 407,632 815,264
-1 -2 -407,632 -815,264

Now, we try dividing 815,264 by 3:

815,264 ÷ 3 = 271,754.6667

If the quotient is a whole number, then 3 and 271,754.6667 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 2 407,632 815,264
-1 -2 -407,632 -815,264

Let's try dividing by 4:

815,264 ÷ 4 = 203,816

If the quotient is a whole number, then 4 and 203,816 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 4 203,816 407,632 815,264
-1 -2 -4 -203,816 -407,632 815,264
Keep dividing by the next highest number until you cannot divide anymore.

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

12481632731462923495846981,1681,3962,3362,7925,58411,16825,47750,954101,908203,816407,632815,264
-1-2-4-8-16-32-73-146-292-349-584-698-1,168-1,396-2,336-2,792-5,584-11,168-25,477-50,954-101,908-203,816-407,632-815,264

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