A:
Positive:
1 x 2779012117 x 163471359 x 471019103 x 269807269 x 1033091003 x 277071751 x 158714573 x 6077
Negative:
-1 x -27790121-17 x -1634713-59 x -471019-103 x -269807-269 x -103309-1003 x -27707-1751 x -15871-4573 x -6077
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 27,790,121, 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 | 27,790,121 | |
| -1 | -27,790,121 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 27,790,121.
Example:
1 x 27,790,121 = 27,790,121
and
-1 x -27,790,121 = 27,790,121
Notice both answers equal 27,790,121
With that explanation out of the way, let's continue. Next, we take the number 27,790,121 and divide it by 2:
27,790,121 ÷ 2 = 13,895,060.5
If the quotient is a whole number, then 2 and 13,895,060.5 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 | 27,790,121 | |
| -1 | -27,790,121 |
Now, we try dividing 27,790,121 by 3:
27,790,121 ÷ 3 = 9,263,373.6667
If the quotient is a whole number, then 3 and 9,263,373.6667 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 | 27,790,121 | |
| -1 | -27,790,121 |
Let's try dividing by 4:
27,790,121 ÷ 4 = 6,947,530.25
If the quotient is a whole number, then 4 and 6,947,530.25 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 | 27,790,121 | |
| -1 | 27,790,121 |
If you did it right, you will end up with this table:
| 1 | 17 | 59 | 103 | 269 | 1,003 | 1,751 | 4,573 | 6,077 | 15,871 | 27,707 | 103,309 | 269,807 | 471,019 | 1,634,713 | 27,790,121 |
| -1 | -17 | -59 | -103 | -269 | -1,003 | -1,751 | -4,573 | -6,077 | -15,871 | -27,707 | -103,309 | -269,807 | -471,019 | -1,634,713 | -27,790,121 |
Here are some more numbers to try:
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