Q: What are the factor combinations of the number 681,109?

 A:
Positive:   1 x 68110911 x 6191913 x 52393121 x 5629143 x 4763433 x 1573
Negative: -1 x -681109-11 x -61919-13 x -52393-121 x -5629-143 x -4763-433 x -1573


How do I find the factor combinations of the number 681,109?

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 681,109, 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.

1 681,109
-1 -681,109

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 681,109.

Example:
1 x 681,109 = 681,109
and
-1 x -681,109 = 681,109
Notice both answers equal 681,109

With that explanation out of the way, let's continue. Next, we take the number 681,109 and divide it by 2:

681,109 ÷ 2 = 340,554.5

If the quotient is a whole number, then 2 and 340,554.5 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:

1 681,109
-1 -681,109

Now, we try dividing 681,109 by 3:

681,109 ÷ 3 = 227,036.3333

If the quotient is a whole number, then 3 and 227,036.3333 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:

1 681,109
-1 -681,109

Let's try dividing by 4:

681,109 ÷ 4 = 170,277.25

If the quotient is a whole number, then 4 and 170,277.25 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:

1 681,109
-1 681,109
Keep dividing by the next highest number until you cannot divide anymore.

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

111131211434331,5734,7635,62952,39361,919681,109
-1-11-13-121-143-433-1,573-4,763-5,629-52,393-61,919-681,109

More Examples

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