A:
Positive:
1 x 139394717 x 199135313 x 107226749 x 28447979 x 17644991 x 153181277 x 50323553 x 25207637 x 218831027 x 135731939 x 71893601 x 3871
Negative:
-1 x -13939471-7 x -1991353-13 x -1072267-49 x -284479-79 x -176449-91 x -153181-277 x -50323-553 x -25207-637 x -21883-1027 x -13573-1939 x -7189-3601 x -3871
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 13,939,471, 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 | 13,939,471 | |
| -1 | -13,939,471 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 13,939,471.
Example:
1 x 13,939,471 = 13,939,471
and
-1 x -13,939,471 = 13,939,471
Notice both answers equal 13,939,471
With that explanation out of the way, let's continue. Next, we take the number 13,939,471 and divide it by 2:
13,939,471 ÷ 2 = 6,969,735.5
If the quotient is a whole number, then 2 and 6,969,735.5 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 | 13,939,471 | |
| -1 | -13,939,471 |
Now, we try dividing 13,939,471 by 3:
13,939,471 ÷ 3 = 4,646,490.3333
If the quotient is a whole number, then 3 and 4,646,490.3333 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 | 13,939,471 | |
| -1 | -13,939,471 |
Let's try dividing by 4:
13,939,471 ÷ 4 = 3,484,867.75
If the quotient is a whole number, then 4 and 3,484,867.75 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 | 13,939,471 | |
| -1 | 13,939,471 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 49 | 79 | 91 | 277 | 553 | 637 | 1,027 | 1,939 | 3,601 | 3,871 | 7,189 | 13,573 | 21,883 | 25,207 | 50,323 | 153,181 | 176,449 | 284,479 | 1,072,267 | 1,991,353 | 13,939,471 |
| -1 | -7 | -13 | -49 | -79 | -91 | -277 | -553 | -637 | -1,027 | -1,939 | -3,601 | -3,871 | -7,189 | -13,573 | -21,883 | -25,207 | -50,323 | -153,181 | -176,449 | -284,479 | -1,072,267 | -1,991,353 | -13,939,471 |
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