A:
Positive:
1 x 877250717 x 1253215319 x 461710931 x 2829841133 x 659587217 x 404263589 x 1489394123 x 21277
Negative:
-1 x -87725071-7 x -12532153-19 x -4617109-31 x -2829841-133 x -659587-217 x -404263-589 x -148939-4123 x -21277
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 87,725,071, 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 | 87,725,071 | |
| -1 | -87,725,071 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 87,725,071.
Example:
1 x 87,725,071 = 87,725,071
and
-1 x -87,725,071 = 87,725,071
Notice both answers equal 87,725,071
With that explanation out of the way, let's continue. Next, we take the number 87,725,071 and divide it by 2:
87,725,071 ÷ 2 = 43,862,535.5
If the quotient is a whole number, then 2 and 43,862,535.5 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 | 87,725,071 | |
| -1 | -87,725,071 |
Now, we try dividing 87,725,071 by 3:
87,725,071 ÷ 3 = 29,241,690.3333
If the quotient is a whole number, then 3 and 29,241,690.3333 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 | 87,725,071 | |
| -1 | -87,725,071 |
Let's try dividing by 4:
87,725,071 ÷ 4 = 21,931,267.75
If the quotient is a whole number, then 4 and 21,931,267.75 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 | 87,725,071 | |
| -1 | 87,725,071 |
If you did it right, you will end up with this table:
| 1 | 7 | 19 | 31 | 133 | 217 | 589 | 4,123 | 21,277 | 148,939 | 404,263 | 659,587 | 2,829,841 | 4,617,109 | 12,532,153 | 87,725,071 |
| -1 | -7 | -19 | -31 | -133 | -217 | -589 | -4,123 | -21,277 | -148,939 | -404,263 | -659,587 | -2,829,841 | -4,617,109 | -12,532,153 | -87,725,071 |
Here are some more numbers to try:
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