Q: What are the factor combinations of the number 909,643?

 A:
Positive:   1 x 9096437 x 12994929 x 31367203 x 4481
Negative: -1 x -909643-7 x -129949-29 x -31367-203 x -4481


How do I find the factor combinations of the number 909,643?

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 909,643, 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.

1 909,643
-1 -909,643

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 909,643.

Example:
1 x 909,643 = 909,643
and
-1 x -909,643 = 909,643
Notice both answers equal 909,643

With that explanation out of the way, let's continue. Next, we take the number 909,643 and divide it by 2:

909,643 ÷ 2 = 454,821.5

If the quotient is a whole number, then 2 and 454,821.5 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:

1 909,643
-1 -909,643

Now, we try dividing 909,643 by 3:

909,643 ÷ 3 = 303,214.3333

If the quotient is a whole number, then 3 and 303,214.3333 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:

1 909,643
-1 -909,643

Let's try dividing by 4:

909,643 ÷ 4 = 227,410.75

If the quotient is a whole number, then 4 and 227,410.75 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:

1 909,643
-1 909,643
Keep dividing by the next highest number until you cannot divide anymore.

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

17292034,48131,367129,949909,643
-1-7-29-203-4,481-31,367-129,949-909,643

More Examples

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