A:
Positive:
1 x 78571455 x 157142917 x 46218523 x 34161585 x 92437115 x 68323391 x 200951955 x 4019
Negative:
-1 x -7857145-5 x -1571429-17 x -462185-23 x -341615-85 x -92437-115 x -68323-391 x -20095-1955 x -4019
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 7,857,145, 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 | 7,857,145 | |
| -1 | -7,857,145 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 7,857,145.
Example:
1 x 7,857,145 = 7,857,145
and
-1 x -7,857,145 = 7,857,145
Notice both answers equal 7,857,145
With that explanation out of the way, let's continue. Next, we take the number 7,857,145 and divide it by 2:
7,857,145 ÷ 2 = 3,928,572.5
If the quotient is a whole number, then 2 and 3,928,572.5 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 | 7,857,145 | |
| -1 | -7,857,145 |
Now, we try dividing 7,857,145 by 3:
7,857,145 ÷ 3 = 2,619,048.3333
If the quotient is a whole number, then 3 and 2,619,048.3333 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 | 7,857,145 | |
| -1 | -7,857,145 |
Let's try dividing by 4:
7,857,145 ÷ 4 = 1,964,286.25
If the quotient is a whole number, then 4 and 1,964,286.25 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 | 7,857,145 | |
| -1 | 7,857,145 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 23 | 85 | 115 | 391 | 1,955 | 4,019 | 20,095 | 68,323 | 92,437 | 341,615 | 462,185 | 1,571,429 | 7,857,145 |
| -1 | -5 | -17 | -23 | -85 | -115 | -391 | -1,955 | -4,019 | -20,095 | -68,323 | -92,437 | -341,615 | -462,185 | -1,571,429 | -7,857,145 |
Here are some more numbers to try:
Try the factor calculator