A:
Positive:
1 x 2790973911 x 253724913 x 2146903121 x 230659143 x 1951731331 x 209691573 x 177431613 x 17303
Negative:
-1 x -27909739-11 x -2537249-13 x -2146903-121 x -230659-143 x -195173-1331 x -20969-1573 x -17743-1613 x -17303
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 27,909,739, 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 | 27,909,739 | |
| -1 | -27,909,739 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 27,909,739.
Example:
1 x 27,909,739 = 27,909,739
and
-1 x -27,909,739 = 27,909,739
Notice both answers equal 27,909,739
With that explanation out of the way, let's continue. Next, we take the number 27,909,739 and divide it by 2:
27,909,739 ÷ 2 = 13,954,869.5
If the quotient is a whole number, then 2 and 13,954,869.5 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 | 27,909,739 | |
| -1 | -27,909,739 |
Now, we try dividing 27,909,739 by 3:
27,909,739 ÷ 3 = 9,303,246.3333
If the quotient is a whole number, then 3 and 9,303,246.3333 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 | 27,909,739 | |
| -1 | -27,909,739 |
Let's try dividing by 4:
27,909,739 ÷ 4 = 6,977,434.75
If the quotient is a whole number, then 4 and 6,977,434.75 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 | 27,909,739 | |
| -1 | 27,909,739 |
If you did it right, you will end up with this table:
| 1 | 11 | 13 | 121 | 143 | 1,331 | 1,573 | 1,613 | 17,303 | 17,743 | 20,969 | 195,173 | 230,659 | 2,146,903 | 2,537,249 | 27,909,739 |
| -1 | -11 | -13 | -121 | -143 | -1,331 | -1,573 | -1,613 | -17,303 | -17,743 | -20,969 | -195,173 | -230,659 | -2,146,903 | -2,537,249 | -27,909,739 |
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