Q: What are the factor combinations of the number 561,416?

 A:
Positive:   1 x 5614162 x 2807084 x 1403548 x 70177
Negative: -1 x -561416-2 x -280708-4 x -140354-8 x -70177


How do I find the factor combinations of the number 561,416?

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 561,416, 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.

1 561,416
-1 -561,416

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 561,416.

Example:
1 x 561,416 = 561,416
and
-1 x -561,416 = 561,416
Notice both answers equal 561,416

With that explanation out of the way, let's continue. Next, we take the number 561,416 and divide it by 2:

561,416 ÷ 2 = 280,708

If the quotient is a whole number, then 2 and 280,708 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 2 280,708 561,416
-1 -2 -280,708 -561,416

Now, we try dividing 561,416 by 3:

561,416 ÷ 3 = 187,138.6667

If the quotient is a whole number, then 3 and 187,138.6667 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 2 280,708 561,416
-1 -2 -280,708 -561,416

Let's try dividing by 4:

561,416 ÷ 4 = 140,354

If the quotient is a whole number, then 4 and 140,354 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 4 140,354 280,708 561,416
-1 -2 -4 -140,354 -280,708 561,416
Keep dividing by the next highest number until you cannot divide anymore.

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

124870,177140,354280,708561,416
-1-2-4-8-70,177-140,354-280,708-561,416

More Examples

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