A:
Positive:
1 x 8388277155 x 16776554311 x 7625706555 x 15251413131 x 6403265655 x 12806531441 x 5821157205 x 116423
Negative:
-1 x -838827715-5 x -167765543-11 x -76257065-55 x -15251413-131 x -6403265-655 x -1280653-1441 x -582115-7205 x -116423
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 838,827,715, 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 | 838,827,715 | |
| -1 | -838,827,715 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 838,827,715.
Example:
1 x 838,827,715 = 838,827,715
and
-1 x -838,827,715 = 838,827,715
Notice both answers equal 838,827,715
With that explanation out of the way, let's continue. Next, we take the number 838,827,715 and divide it by 2:
838,827,715 ÷ 2 = 419,413,857.5
If the quotient is a whole number, then 2 and 419,413,857.5 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 | 838,827,715 | |
| -1 | -838,827,715 |
Now, we try dividing 838,827,715 by 3:
838,827,715 ÷ 3 = 279,609,238.3333
If the quotient is a whole number, then 3 and 279,609,238.3333 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 | 838,827,715 | |
| -1 | -838,827,715 |
Let's try dividing by 4:
838,827,715 ÷ 4 = 209,706,928.75
If the quotient is a whole number, then 4 and 209,706,928.75 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 | 838,827,715 | |
| -1 | 838,827,715 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 131 | 655 | 1,441 | 7,205 | 116,423 | 582,115 | 1,280,653 | 6,403,265 | 15,251,413 | 76,257,065 | 167,765,543 | 838,827,715 |
| -1 | -5 | -11 | -55 | -131 | -655 | -1,441 | -7,205 | -116,423 | -582,115 | -1,280,653 | -6,403,265 | -15,251,413 | -76,257,065 | -167,765,543 | -838,827,715 |
Here are some more numbers to try:
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