A:
Positive:
1 x 395718713 x 30439919 x 20827337 x 106951247 x 16021433 x 9139481 x 8227703 x 5629
Negative:
-1 x -3957187-13 x -304399-19 x -208273-37 x -106951-247 x -16021-433 x -9139-481 x -8227-703 x -5629
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 3,957,187, 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 | 3,957,187 | |
| -1 | -3,957,187 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 3,957,187.
Example:
1 x 3,957,187 = 3,957,187
and
-1 x -3,957,187 = 3,957,187
Notice both answers equal 3,957,187
With that explanation out of the way, let's continue. Next, we take the number 3,957,187 and divide it by 2:
3,957,187 ÷ 2 = 1,978,593.5
If the quotient is a whole number, then 2 and 1,978,593.5 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 | 3,957,187 | |
| -1 | -3,957,187 |
Now, we try dividing 3,957,187 by 3:
3,957,187 ÷ 3 = 1,319,062.3333
If the quotient is a whole number, then 3 and 1,319,062.3333 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 | 3,957,187 | |
| -1 | -3,957,187 |
Let's try dividing by 4:
3,957,187 ÷ 4 = 989,296.75
If the quotient is a whole number, then 4 and 989,296.75 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 | 3,957,187 | |
| -1 | 3,957,187 |
If you did it right, you will end up with this table:
| 1 | 13 | 19 | 37 | 247 | 433 | 481 | 703 | 5,629 | 8,227 | 9,139 | 16,021 | 106,951 | 208,273 | 304,399 | 3,957,187 |
| -1 | -13 | -19 | -37 | -247 | -433 | -481 | -703 | -5,629 | -8,227 | -9,139 | -16,021 | -106,951 | -208,273 | -304,399 | -3,957,187 |
Here are some more numbers to try:
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