A:
Positive:
1 x 71297155 x 142594317 x 41939537 x 19269585 x 83879185 x 38539629 x 113352267 x 3145
Negative:
-1 x -7129715-5 x -1425943-17 x -419395-37 x -192695-85 x -83879-185 x -38539-629 x -11335-2267 x -3145
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 7,129,715, 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 | 7,129,715 | |
| -1 | -7,129,715 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 7,129,715.
Example:
1 x 7,129,715 = 7,129,715
and
-1 x -7,129,715 = 7,129,715
Notice both answers equal 7,129,715
With that explanation out of the way, let's continue. Next, we take the number 7,129,715 and divide it by 2:
7,129,715 ÷ 2 = 3,564,857.5
If the quotient is a whole number, then 2 and 3,564,857.5 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 | 7,129,715 | |
| -1 | -7,129,715 |
Now, we try dividing 7,129,715 by 3:
7,129,715 ÷ 3 = 2,376,571.6667
If the quotient is a whole number, then 3 and 2,376,571.6667 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 | 7,129,715 | |
| -1 | -7,129,715 |
Let's try dividing by 4:
7,129,715 ÷ 4 = 1,782,428.75
If the quotient is a whole number, then 4 and 1,782,428.75 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 | 7,129,715 | |
| -1 | 7,129,715 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 37 | 85 | 185 | 629 | 2,267 | 3,145 | 11,335 | 38,539 | 83,879 | 192,695 | 419,395 | 1,425,943 | 7,129,715 |
| -1 | -5 | -17 | -37 | -85 | -185 | -629 | -2,267 | -3,145 | -11,335 | -38,539 | -83,879 | -192,695 | -419,395 | -1,425,943 | -7,129,715 |
Here are some more numbers to try:
Try the factor calculator