A:
Positive:
1 x 287108913 x 22085337 x 7759747 x 61087127 x 22607481 x 5969611 x 46991651 x 1739
Negative:
-1 x -2871089-13 x -220853-37 x -77597-47 x -61087-127 x -22607-481 x -5969-611 x -4699-1651 x -1739
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 2,871,089, 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 | 2,871,089 | |
| -1 | -2,871,089 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 2,871,089.
Example:
1 x 2,871,089 = 2,871,089
and
-1 x -2,871,089 = 2,871,089
Notice both answers equal 2,871,089
With that explanation out of the way, let's continue. Next, we take the number 2,871,089 and divide it by 2:
2,871,089 ÷ 2 = 1,435,544.5
If the quotient is a whole number, then 2 and 1,435,544.5 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 | 2,871,089 | |
| -1 | -2,871,089 |
Now, we try dividing 2,871,089 by 3:
2,871,089 ÷ 3 = 957,029.6667
If the quotient is a whole number, then 3 and 957,029.6667 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 | 2,871,089 | |
| -1 | -2,871,089 |
Let's try dividing by 4:
2,871,089 ÷ 4 = 717,772.25
If the quotient is a whole number, then 4 and 717,772.25 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 | 2,871,089 | |
| -1 | 2,871,089 |
If you did it right, you will end up with this table:
| 1 | 13 | 37 | 47 | 127 | 481 | 611 | 1,651 | 1,739 | 4,699 | 5,969 | 22,607 | 61,087 | 77,597 | 220,853 | 2,871,089 |
| -1 | -13 | -37 | -47 | -127 | -481 | -611 | -1,651 | -1,739 | -4,699 | -5,969 | -22,607 | -61,087 | -77,597 | -220,853 | -2,871,089 |
Here are some more numbers to try:
Try the factor calculator