Q: What are the factor combinations of the number 561,366?

 A:
Positive:   1 x 5613662 x 2806833 x 1871226 x 935619 x 6237413 x 4318218 x 3118726 x 2159139 x 1439478 x 7197117 x 4798234 x 2399
Negative: -1 x -561366-2 x -280683-3 x -187122-6 x -93561-9 x -62374-13 x -43182-18 x -31187-26 x -21591-39 x -14394-78 x -7197-117 x -4798-234 x -2399


How do I find the factor combinations of the number 561,366?

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 561,366, 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.

1 561,366
-1 -561,366

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 561,366.

Example:
1 x 561,366 = 561,366
and
-1 x -561,366 = 561,366
Notice both answers equal 561,366

With that explanation out of the way, let's continue. Next, we take the number 561,366 and divide it by 2:

561,366 ÷ 2 = 280,683

If the quotient is a whole number, then 2 and 280,683 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 2 280,683 561,366
-1 -2 -280,683 -561,366

Now, we try dividing 561,366 by 3:

561,366 ÷ 3 = 187,122

If the quotient is a whole number, then 3 and 187,122 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 3 187,122 280,683 561,366
-1 -2 -3 -187,122 -280,683 -561,366

Let's try dividing by 4:

561,366 ÷ 4 = 140,341.5

If the quotient is a whole number, then 4 and 140,341.5 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 2 3 187,122 280,683 561,366
-1 -2 -3 -187,122 -280,683 561,366
Keep dividing by the next highest number until you cannot divide anymore.

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

1236913182639781172342,3994,7987,19714,39421,59131,18743,18262,37493,561187,122280,683561,366
-1-2-3-6-9-13-18-26-39-78-117-234-2,399-4,798-7,197-14,394-21,591-31,187-43,182-62,374-93,561-187,122-280,683-561,366

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