A:
Positive:
1 x 3187973919 x 167788167 x 47581779 x 403541317 x 1005671273 x 250431501 x 212395293 x 6023
Negative:
-1 x -31879739-19 x -1677881-67 x -475817-79 x -403541-317 x -100567-1273 x -25043-1501 x -21239-5293 x -6023
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 31,879,739, 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 | 31,879,739 | |
| -1 | -31,879,739 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 31,879,739.
Example:
1 x 31,879,739 = 31,879,739
and
-1 x -31,879,739 = 31,879,739
Notice both answers equal 31,879,739
With that explanation out of the way, let's continue. Next, we take the number 31,879,739 and divide it by 2:
31,879,739 ÷ 2 = 15,939,869.5
If the quotient is a whole number, then 2 and 15,939,869.5 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 | 31,879,739 | |
| -1 | -31,879,739 |
Now, we try dividing 31,879,739 by 3:
31,879,739 ÷ 3 = 10,626,579.6667
If the quotient is a whole number, then 3 and 10,626,579.6667 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 | 31,879,739 | |
| -1 | -31,879,739 |
Let's try dividing by 4:
31,879,739 ÷ 4 = 7,969,934.75
If the quotient is a whole number, then 4 and 7,969,934.75 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 | 31,879,739 | |
| -1 | 31,879,739 |
If you did it right, you will end up with this table:
| 1 | 19 | 67 | 79 | 317 | 1,273 | 1,501 | 5,293 | 6,023 | 21,239 | 25,043 | 100,567 | 403,541 | 475,817 | 1,677,881 | 31,879,739 |
| -1 | -19 | -67 | -79 | -317 | -1,273 | -1,501 | -5,293 | -6,023 | -21,239 | -25,043 | -100,567 | -403,541 | -475,817 | -1,677,881 | -31,879,739 |
Here are some more numbers to try:
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