A:
Positive:
1 x 48738277913 x 3749098389 x 5476211223 x 21855731157 x 4212471889 x 2580112899 x 16812119847 x 24557
Negative:
-1 x -487382779-13 x -37490983-89 x -5476211-223 x -2185573-1157 x -421247-1889 x -258011-2899 x -168121-19847 x -24557
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 487,382,779, 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 | 487,382,779 | |
| -1 | -487,382,779 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 487,382,779.
Example:
1 x 487,382,779 = 487,382,779
and
-1 x -487,382,779 = 487,382,779
Notice both answers equal 487,382,779
With that explanation out of the way, let's continue. Next, we take the number 487,382,779 and divide it by 2:
487,382,779 ÷ 2 = 243,691,389.5
If the quotient is a whole number, then 2 and 243,691,389.5 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 | 487,382,779 | |
| -1 | -487,382,779 |
Now, we try dividing 487,382,779 by 3:
487,382,779 ÷ 3 = 162,460,926.3333
If the quotient is a whole number, then 3 and 162,460,926.3333 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 | 487,382,779 | |
| -1 | -487,382,779 |
Let's try dividing by 4:
487,382,779 ÷ 4 = 121,845,694.75
If the quotient is a whole number, then 4 and 121,845,694.75 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 | 487,382,779 | |
| -1 | 487,382,779 |
If you did it right, you will end up with this table:
| 1 | 13 | 89 | 223 | 1,157 | 1,889 | 2,899 | 19,847 | 24,557 | 168,121 | 258,011 | 421,247 | 2,185,573 | 5,476,211 | 37,490,983 | 487,382,779 |
| -1 | -13 | -89 | -223 | -1,157 | -1,889 | -2,899 | -19,847 | -24,557 | -168,121 | -258,011 | -421,247 | -2,185,573 | -5,476,211 | -37,490,983 | -487,382,779 |
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