A:
Positive:
1 x 15871317 x 22673313 x 12208791 x 17441107 x 14833163 x 9737749 x 21191141 x 1391
Negative:
-1 x -1587131-7 x -226733-13 x -122087-91 x -17441-107 x -14833-163 x -9737-749 x -2119-1141 x -1391
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 1,587,131, 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 | 1,587,131 | |
| -1 | -1,587,131 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 1,587,131.
Example:
1 x 1,587,131 = 1,587,131
and
-1 x -1,587,131 = 1,587,131
Notice both answers equal 1,587,131
With that explanation out of the way, let's continue. Next, we take the number 1,587,131 and divide it by 2:
1,587,131 ÷ 2 = 793,565.5
If the quotient is a whole number, then 2 and 793,565.5 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 | 1,587,131 | |
| -1 | -1,587,131 |
Now, we try dividing 1,587,131 by 3:
1,587,131 ÷ 3 = 529,043.6667
If the quotient is a whole number, then 3 and 529,043.6667 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 | 1,587,131 | |
| -1 | -1,587,131 |
Let's try dividing by 4:
1,587,131 ÷ 4 = 396,782.75
If the quotient is a whole number, then 4 and 396,782.75 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 | 1,587,131 | |
| -1 | 1,587,131 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 91 | 107 | 163 | 749 | 1,141 | 1,391 | 2,119 | 9,737 | 14,833 | 17,441 | 122,087 | 226,733 | 1,587,131 |
| -1 | -7 | -13 | -91 | -107 | -163 | -749 | -1,141 | -1,391 | -2,119 | -9,737 | -14,833 | -17,441 | -122,087 | -226,733 | -1,587,131 |
Here are some more numbers to try:
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