A:
Positive:
1 x 78593155 x 157186379 x 99485101 x 77815197 x 39895395 x 19897505 x 15563985 x 7979
Negative:
-1 x -7859315-5 x -1571863-79 x -99485-101 x -77815-197 x -39895-395 x -19897-505 x -15563-985 x -7979
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 7,859,315, 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 | 7,859,315 | |
| -1 | -7,859,315 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 7,859,315.
Example:
1 x 7,859,315 = 7,859,315
and
-1 x -7,859,315 = 7,859,315
Notice both answers equal 7,859,315
With that explanation out of the way, let's continue. Next, we take the number 7,859,315 and divide it by 2:
7,859,315 ÷ 2 = 3,929,657.5
If the quotient is a whole number, then 2 and 3,929,657.5 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 | 7,859,315 | |
| -1 | -7,859,315 |
Now, we try dividing 7,859,315 by 3:
7,859,315 ÷ 3 = 2,619,771.6667
If the quotient is a whole number, then 3 and 2,619,771.6667 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 | 7,859,315 | |
| -1 | -7,859,315 |
Let's try dividing by 4:
7,859,315 ÷ 4 = 1,964,828.75
If the quotient is a whole number, then 4 and 1,964,828.75 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 | 7,859,315 | |
| -1 | 7,859,315 |
If you did it right, you will end up with this table:
| 1 | 5 | 79 | 101 | 197 | 395 | 505 | 985 | 7,979 | 15,563 | 19,897 | 39,895 | 77,815 | 99,485 | 1,571,863 | 7,859,315 |
| -1 | -5 | -79 | -101 | -197 | -395 | -505 | -985 | -7,979 | -15,563 | -19,897 | -39,895 | -77,815 | -99,485 | -1,571,863 | -7,859,315 |
Here are some more numbers to try:
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