A:
Positive:
1 x 8118305155 x 162366103157 x 5170895401 x 2024515785 x 10341792005 x 4049032579 x 31478512895 x 62957
Negative:
-1 x -811830515-5 x -162366103-157 x -5170895-401 x -2024515-785 x -1034179-2005 x -404903-2579 x -314785-12895 x -62957
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 811,830,515, it is easier to work with a table - it's called factoring from the outside in.
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 | 811,830,515 | |
| -1 | -811,830,515 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 811,830,515.
Example:
1 x 811,830,515 = 811,830,515
and
-1 x -811,830,515 = 811,830,515
Notice both answers equal 811,830,515
With that explanation out of the way, let's continue. Next, we take the number 811,830,515 and divide it by 2:
811,830,515 ÷ 2 = 405,915,257.5
If the quotient is a whole number, then 2 and 405,915,257.5 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 | 811,830,515 | |
| -1 | -811,830,515 |
Now, we try dividing 811,830,515 by 3:
811,830,515 ÷ 3 = 270,610,171.6667
If the quotient is a whole number, then 3 and 270,610,171.6667 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 | 811,830,515 | |
| -1 | -811,830,515 |
Let's try dividing by 4:
811,830,515 ÷ 4 = 202,957,628.75
If the quotient is a whole number, then 4 and 202,957,628.75 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 | 811,830,515 | |
| -1 | 811,830,515 |
If you did it right, you will end up with this table:
| 1 | 5 | 157 | 401 | 785 | 2,005 | 2,579 | 12,895 | 62,957 | 314,785 | 404,903 | 1,034,179 | 2,024,515 | 5,170,895 | 162,366,103 | 811,830,515 |
| -1 | -5 | -157 | -401 | -785 | -2,005 | -2,579 | -12,895 | -62,957 | -314,785 | -404,903 | -1,034,179 | -2,024,515 | -5,170,895 | -162,366,103 | -811,830,515 |
Here are some more numbers to try:
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