A:
Positive:
1 x 278067797 x 397239711 x 252788913 x 213898377 x 36112791 x 305569143 x 1944531001 x 27779
Negative:
-1 x -27806779-7 x -3972397-11 x -2527889-13 x -2138983-77 x -361127-91 x -305569-143 x -194453-1001 x -27779
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 27,806,779, 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 | 27,806,779 | |
| -1 | -27,806,779 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 27,806,779.
Example:
1 x 27,806,779 = 27,806,779
and
-1 x -27,806,779 = 27,806,779
Notice both answers equal 27,806,779
With that explanation out of the way, let's continue. Next, we take the number 27,806,779 and divide it by 2:
27,806,779 ÷ 2 = 13,903,389.5
If the quotient is a whole number, then 2 and 13,903,389.5 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 | 27,806,779 | |
| -1 | -27,806,779 |
Now, we try dividing 27,806,779 by 3:
27,806,779 ÷ 3 = 9,268,926.3333
If the quotient is a whole number, then 3 and 9,268,926.3333 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 | 27,806,779 | |
| -1 | -27,806,779 |
Let's try dividing by 4:
27,806,779 ÷ 4 = 6,951,694.75
If the quotient is a whole number, then 4 and 6,951,694.75 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 | 27,806,779 | |
| -1 | 27,806,779 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 13 | 77 | 91 | 143 | 1,001 | 27,779 | 194,453 | 305,569 | 361,127 | 2,138,983 | 2,527,889 | 3,972,397 | 27,806,779 |
| -1 | -7 | -11 | -13 | -77 | -91 | -143 | -1,001 | -27,779 | -194,453 | -305,569 | -361,127 | -2,138,983 | -2,527,889 | -3,972,397 | -27,806,779 |
Here are some more numbers to try:
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