A:
Positive:
1 x 78108317 x 111583329 x 269339109 x 71659203 x 38477353 x 22127763 x 102372471 x 3161
Negative:
-1 x -7810831-7 x -1115833-29 x -269339-109 x -71659-203 x -38477-353 x -22127-763 x -10237-2471 x -3161
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 7,810,831, 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 | 7,810,831 | |
| -1 | -7,810,831 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 7,810,831.
Example:
1 x 7,810,831 = 7,810,831
and
-1 x -7,810,831 = 7,810,831
Notice both answers equal 7,810,831
With that explanation out of the way, let's continue. Next, we take the number 7,810,831 and divide it by 2:
7,810,831 ÷ 2 = 3,905,415.5
If the quotient is a whole number, then 2 and 3,905,415.5 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 | 7,810,831 | |
| -1 | -7,810,831 |
Now, we try dividing 7,810,831 by 3:
7,810,831 ÷ 3 = 2,603,610.3333
If the quotient is a whole number, then 3 and 2,603,610.3333 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 | 7,810,831 | |
| -1 | -7,810,831 |
Let's try dividing by 4:
7,810,831 ÷ 4 = 1,952,707.75
If the quotient is a whole number, then 4 and 1,952,707.75 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 | 7,810,831 | |
| -1 | 7,810,831 |
If you did it right, you will end up with this table:
| 1 | 7 | 29 | 109 | 203 | 353 | 763 | 2,471 | 3,161 | 10,237 | 22,127 | 38,477 | 71,659 | 269,339 | 1,115,833 | 7,810,831 |
| -1 | -7 | -29 | -109 | -203 | -353 | -763 | -2,471 | -3,161 | -10,237 | -22,127 | -38,477 | -71,659 | -269,339 | -1,115,833 | -7,810,831 |
Here are some more numbers to try:
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