A:
Positive:
1 x 30879317 x 44113311 x 28072117 x 18164349 x 6301977 x 40103119 x 25949187 x 16513337 x 9163539 x 5729833 x 37071309 x 2359
Negative:
-1 x -3087931-7 x -441133-11 x -280721-17 x -181643-49 x -63019-77 x -40103-119 x -25949-187 x -16513-337 x -9163-539 x -5729-833 x -3707-1309 x -2359
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 3,087,931, 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 | 3,087,931 | |
| -1 | -3,087,931 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 3,087,931.
Example:
1 x 3,087,931 = 3,087,931
and
-1 x -3,087,931 = 3,087,931
Notice both answers equal 3,087,931
With that explanation out of the way, let's continue. Next, we take the number 3,087,931 and divide it by 2:
3,087,931 ÷ 2 = 1,543,965.5
If the quotient is a whole number, then 2 and 1,543,965.5 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 | 3,087,931 | |
| -1 | -3,087,931 |
Now, we try dividing 3,087,931 by 3:
3,087,931 ÷ 3 = 1,029,310.3333
If the quotient is a whole number, then 3 and 1,029,310.3333 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 | 3,087,931 | |
| -1 | -3,087,931 |
Let's try dividing by 4:
3,087,931 ÷ 4 = 771,982.75
If the quotient is a whole number, then 4 and 771,982.75 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 | 3,087,931 | |
| -1 | 3,087,931 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 17 | 49 | 77 | 119 | 187 | 337 | 539 | 833 | 1,309 | 2,359 | 3,707 | 5,729 | 9,163 | 16,513 | 25,949 | 40,103 | 63,019 | 181,643 | 280,721 | 441,133 | 3,087,931 |
| -1 | -7 | -11 | -17 | -49 | -77 | -119 | -187 | -337 | -539 | -833 | -1,309 | -2,359 | -3,707 | -5,729 | -9,163 | -16,513 | -25,949 | -40,103 | -63,019 | -181,643 | -280,721 | -441,133 | -3,087,931 |
Here are some more numbers to try:
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