A:
Positive:
1 x 787237113 x 60556723 x 342277113 x 69667233 x 33787299 x 263291469 x 53592599 x 3029
Negative:
-1 x -7872371-13 x -605567-23 x -342277-113 x -69667-233 x -33787-299 x -26329-1469 x -5359-2599 x -3029
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 7,872,371, 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 | 7,872,371 | |
| -1 | -7,872,371 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 7,872,371.
Example:
1 x 7,872,371 = 7,872,371
and
-1 x -7,872,371 = 7,872,371
Notice both answers equal 7,872,371
With that explanation out of the way, let's continue. Next, we take the number 7,872,371 and divide it by 2:
7,872,371 ÷ 2 = 3,936,185.5
If the quotient is a whole number, then 2 and 3,936,185.5 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 | 7,872,371 | |
| -1 | -7,872,371 |
Now, we try dividing 7,872,371 by 3:
7,872,371 ÷ 3 = 2,624,123.6667
If the quotient is a whole number, then 3 and 2,624,123.6667 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 | 7,872,371 | |
| -1 | -7,872,371 |
Let's try dividing by 4:
7,872,371 ÷ 4 = 1,968,092.75
If the quotient is a whole number, then 4 and 1,968,092.75 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 | 7,872,371 | |
| -1 | 7,872,371 |
If you did it right, you will end up with this table:
| 1 | 13 | 23 | 113 | 233 | 299 | 1,469 | 2,599 | 3,029 | 5,359 | 26,329 | 33,787 | 69,667 | 342,277 | 605,567 | 7,872,371 |
| -1 | -13 | -23 | -113 | -233 | -299 | -1,469 | -2,599 | -3,029 | -5,359 | -26,329 | -33,787 | -69,667 | -342,277 | -605,567 | -7,872,371 |
Here are some more numbers to try:
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