A:
Positive:
1 x 139158117 x 198797313 x 107044737 x 37610391 x 152921259 x 53729481 x 289313367 x 4133
Negative:
-1 x -13915811-7 x -1987973-13 x -1070447-37 x -376103-91 x -152921-259 x -53729-481 x -28931-3367 x -4133
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 13,915,811, 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 | 13,915,811 | |
| -1 | -13,915,811 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 13,915,811.
Example:
1 x 13,915,811 = 13,915,811
and
-1 x -13,915,811 = 13,915,811
Notice both answers equal 13,915,811
With that explanation out of the way, let's continue. Next, we take the number 13,915,811 and divide it by 2:
13,915,811 ÷ 2 = 6,957,905.5
If the quotient is a whole number, then 2 and 6,957,905.5 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 | 13,915,811 | |
| -1 | -13,915,811 |
Now, we try dividing 13,915,811 by 3:
13,915,811 ÷ 3 = 4,638,603.6667
If the quotient is a whole number, then 3 and 4,638,603.6667 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 | 13,915,811 | |
| -1 | -13,915,811 |
Let's try dividing by 4:
13,915,811 ÷ 4 = 3,478,952.75
If the quotient is a whole number, then 4 and 3,478,952.75 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 | 13,915,811 | |
| -1 | 13,915,811 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 37 | 91 | 259 | 481 | 3,367 | 4,133 | 28,931 | 53,729 | 152,921 | 376,103 | 1,070,447 | 1,987,973 | 13,915,811 |
| -1 | -7 | -13 | -37 | -91 | -259 | -481 | -3,367 | -4,133 | -28,931 | -53,729 | -152,921 | -376,103 | -1,070,447 | -1,987,973 | -13,915,811 |
Here are some more numbers to try:
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