A:
Positive:
1 x 9878055 x 1975617 x 14111513 x 7598535 x 2822365 x 1519791 x 10855167 x 5915169 x 5845455 x 2171835 x 1183845 x 1169
Negative:
-1 x -987805-5 x -197561-7 x -141115-13 x -75985-35 x -28223-65 x -15197-91 x -10855-167 x -5915-169 x -5845-455 x -2171-835 x -1183-845 x -1169
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 987,805, 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 | 987,805 | |
| -1 | -987,805 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 987,805.
Example:
1 x 987,805 = 987,805
and
-1 x -987,805 = 987,805
Notice both answers equal 987,805
With that explanation out of the way, let's continue. Next, we take the number 987,805 and divide it by 2:
987,805 ÷ 2 = 493,902.5
If the quotient is a whole number, then 2 and 493,902.5 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 | 987,805 | |
| -1 | -987,805 |
Now, we try dividing 987,805 by 3:
987,805 ÷ 3 = 329,268.3333
If the quotient is a whole number, then 3 and 329,268.3333 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 | 987,805 | |
| -1 | -987,805 |
Let's try dividing by 4:
987,805 ÷ 4 = 246,951.25
If the quotient is a whole number, then 4 and 246,951.25 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 | 987,805 | |
| -1 | 987,805 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 13 | 35 | 65 | 91 | 167 | 169 | 455 | 835 | 845 | 1,169 | 1,183 | 2,171 | 5,845 | 5,915 | 10,855 | 15,197 | 28,223 | 75,985 | 141,115 | 197,561 | 987,805 |
| -1 | -5 | -7 | -13 | -35 | -65 | -91 | -167 | -169 | -455 | -835 | -845 | -1,169 | -1,183 | -2,171 | -5,845 | -5,915 | -10,855 | -15,197 | -28,223 | -75,985 | -141,115 | -197,561 | -987,805 |
Here are some more numbers to try:
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