A:
Positive:
1 x 71508717 x 102155313 x 55006791 x 78581179 x 39949439 x 162891253 x 57072327 x 3073
Negative:
-1 x -7150871-7 x -1021553-13 x -550067-91 x -78581-179 x -39949-439 x -16289-1253 x -5707-2327 x -3073
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 7,150,871, 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 | 7,150,871 | |
| -1 | -7,150,871 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 7,150,871.
Example:
1 x 7,150,871 = 7,150,871
and
-1 x -7,150,871 = 7,150,871
Notice both answers equal 7,150,871
With that explanation out of the way, let's continue. Next, we take the number 7,150,871 and divide it by 2:
7,150,871 ÷ 2 = 3,575,435.5
If the quotient is a whole number, then 2 and 3,575,435.5 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 | 7,150,871 | |
| -1 | -7,150,871 |
Now, we try dividing 7,150,871 by 3:
7,150,871 ÷ 3 = 2,383,623.6667
If the quotient is a whole number, then 3 and 2,383,623.6667 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 | 7,150,871 | |
| -1 | -7,150,871 |
Let's try dividing by 4:
7,150,871 ÷ 4 = 1,787,717.75
If the quotient is a whole number, then 4 and 1,787,717.75 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 | 7,150,871 | |
| -1 | 7,150,871 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 91 | 179 | 439 | 1,253 | 2,327 | 3,073 | 5,707 | 16,289 | 39,949 | 78,581 | 550,067 | 1,021,553 | 7,150,871 |
| -1 | -7 | -13 | -91 | -179 | -439 | -1,253 | -2,327 | -3,073 | -5,707 | -16,289 | -39,949 | -78,581 | -550,067 | -1,021,553 | -7,150,871 |
Here are some more numbers to try:
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