A:
Positive:
1 x 8149495717 x 479382123 x 3543259257 x 317101391 x 208427811 x 1004874369 x 186535911 x 13787
Negative:
-1 x -81494957-17 x -4793821-23 x -3543259-257 x -317101-391 x -208427-811 x -100487-4369 x -18653-5911 x -13787
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 81,494,957, 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 | 81,494,957 | |
| -1 | -81,494,957 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 81,494,957.
Example:
1 x 81,494,957 = 81,494,957
and
-1 x -81,494,957 = 81,494,957
Notice both answers equal 81,494,957
With that explanation out of the way, let's continue. Next, we take the number 81,494,957 and divide it by 2:
81,494,957 ÷ 2 = 40,747,478.5
If the quotient is a whole number, then 2 and 40,747,478.5 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 | 81,494,957 | |
| -1 | -81,494,957 |
Now, we try dividing 81,494,957 by 3:
81,494,957 ÷ 3 = 27,164,985.6667
If the quotient is a whole number, then 3 and 27,164,985.6667 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 | 81,494,957 | |
| -1 | -81,494,957 |
Let's try dividing by 4:
81,494,957 ÷ 4 = 20,373,739.25
If the quotient is a whole number, then 4 and 20,373,739.25 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 | 81,494,957 | |
| -1 | 81,494,957 |
If you did it right, you will end up with this table:
| 1 | 17 | 23 | 257 | 391 | 811 | 4,369 | 5,911 | 13,787 | 18,653 | 100,487 | 208,427 | 317,101 | 3,543,259 | 4,793,821 | 81,494,957 |
| -1 | -17 | -23 | -257 | -391 | -811 | -4,369 | -5,911 | -13,787 | -18,653 | -100,487 | -208,427 | -317,101 | -3,543,259 | -4,793,821 | -81,494,957 |
Here are some more numbers to try:
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