A:
Positive:
1 x 991747911 x 90158913 x 762883143 x 69353223 x 44473311 x 318892453 x 40432899 x 3421
Negative:
-1 x -9917479-11 x -901589-13 x -762883-143 x -69353-223 x -44473-311 x -31889-2453 x -4043-2899 x -3421
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 9,917,479, 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 | 9,917,479 | |
| -1 | -9,917,479 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 9,917,479.
Example:
1 x 9,917,479 = 9,917,479
and
-1 x -9,917,479 = 9,917,479
Notice both answers equal 9,917,479
With that explanation out of the way, let's continue. Next, we take the number 9,917,479 and divide it by 2:
9,917,479 ÷ 2 = 4,958,739.5
If the quotient is a whole number, then 2 and 4,958,739.5 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 | 9,917,479 | |
| -1 | -9,917,479 |
Now, we try dividing 9,917,479 by 3:
9,917,479 ÷ 3 = 3,305,826.3333
If the quotient is a whole number, then 3 and 3,305,826.3333 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 | 9,917,479 | |
| -1 | -9,917,479 |
Let's try dividing by 4:
9,917,479 ÷ 4 = 2,479,369.75
If the quotient is a whole number, then 4 and 2,479,369.75 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 | 9,917,479 | |
| -1 | 9,917,479 |
If you did it right, you will end up with this table:
| 1 | 11 | 13 | 143 | 223 | 311 | 2,453 | 2,899 | 3,421 | 4,043 | 31,889 | 44,473 | 69,353 | 762,883 | 901,589 | 9,917,479 |
| -1 | -11 | -13 | -143 | -223 | -311 | -2,453 | -2,899 | -3,421 | -4,043 | -31,889 | -44,473 | -69,353 | -762,883 | -901,589 | -9,917,479 |
Here are some more numbers to try:
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