Q: What are the factor combinations of the number 8,351,945?

 A:
Positive:   1 x 83519455 x 16703897 x 119313535 x 238627
Negative: -1 x -8351945-5 x -1670389-7 x -1193135-35 x -238627


How do I find the factor combinations of the number 8,351,945?

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 8,351,945, 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 8,351,945
-1 -8,351,945

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 8,351,945.

Example:
1 x 8,351,945 = 8,351,945
and
-1 x -8,351,945 = 8,351,945
Notice both answers equal 8,351,945

With that explanation out of the way, let's continue. Next, we take the number 8,351,945 and divide it by 2:

8,351,945 ÷ 2 = 4,175,972.5

If the quotient is a whole number, then 2 and 4,175,972.5 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 8,351,945
-1 -8,351,945

Now, we try dividing 8,351,945 by 3:

8,351,945 ÷ 3 = 2,783,981.6667

If the quotient is a whole number, then 3 and 2,783,981.6667 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 8,351,945
-1 -8,351,945

Let's try dividing by 4:

8,351,945 ÷ 4 = 2,087,986.25

If the quotient is a whole number, then 4 and 2,087,986.25 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 8,351,945
-1 8,351,945
Keep dividing by the next highest number until you cannot divide anymore.

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

15735238,6271,193,1351,670,3898,351,945
-1-5-7-35-238,627-1,193,135-1,670,389-8,351,945

More Examples

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