A:
Positive:
1 x 408787117 x 24046337 x 11048367 x 6101397 x 42143629 x 64991139 x 35891649 x 2479
Negative:
-1 x -4087871-17 x -240463-37 x -110483-67 x -61013-97 x -42143-629 x -6499-1139 x -3589-1649 x -2479
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 4,087,871, 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 | 4,087,871 | |
| -1 | -4,087,871 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 4,087,871.
Example:
1 x 4,087,871 = 4,087,871
and
-1 x -4,087,871 = 4,087,871
Notice both answers equal 4,087,871
With that explanation out of the way, let's continue. Next, we take the number 4,087,871 and divide it by 2:
4,087,871 ÷ 2 = 2,043,935.5
If the quotient is a whole number, then 2 and 2,043,935.5 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 | 4,087,871 | |
| -1 | -4,087,871 |
Now, we try dividing 4,087,871 by 3:
4,087,871 ÷ 3 = 1,362,623.6667
If the quotient is a whole number, then 3 and 1,362,623.6667 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 | 4,087,871 | |
| -1 | -4,087,871 |
Let's try dividing by 4:
4,087,871 ÷ 4 = 1,021,967.75
If the quotient is a whole number, then 4 and 1,021,967.75 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 | 4,087,871 | |
| -1 | 4,087,871 |
If you did it right, you will end up with this table:
| 1 | 17 | 37 | 67 | 97 | 629 | 1,139 | 1,649 | 2,479 | 3,589 | 6,499 | 42,143 | 61,013 | 110,483 | 240,463 | 4,087,871 |
| -1 | -17 | -37 | -67 | -97 | -629 | -1,139 | -1,649 | -2,479 | -3,589 | -6,499 | -42,143 | -61,013 | -110,483 | -240,463 | -4,087,871 |
Here are some more numbers to try:
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