A:
Positive:
1 x 78752455 x 15750497 x 112503535 x 225007223 x 353151009 x 78051115 x 70631561 x 5045
Negative:
-1 x -7875245-5 x -1575049-7 x -1125035-35 x -225007-223 x -35315-1009 x -7805-1115 x -7063-1561 x -5045
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 7,875,245, 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 | 7,875,245 | |
| -1 | -7,875,245 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 7,875,245.
Example:
1 x 7,875,245 = 7,875,245
and
-1 x -7,875,245 = 7,875,245
Notice both answers equal 7,875,245
With that explanation out of the way, let's continue. Next, we take the number 7,875,245 and divide it by 2:
7,875,245 ÷ 2 = 3,937,622.5
If the quotient is a whole number, then 2 and 3,937,622.5 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 | 7,875,245 | |
| -1 | -7,875,245 |
Now, we try dividing 7,875,245 by 3:
7,875,245 ÷ 3 = 2,625,081.6667
If the quotient is a whole number, then 3 and 2,625,081.6667 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 | 7,875,245 | |
| -1 | -7,875,245 |
Let's try dividing by 4:
7,875,245 ÷ 4 = 1,968,811.25
If the quotient is a whole number, then 4 and 1,968,811.25 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 | 7,875,245 | |
| -1 | 7,875,245 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 223 | 1,009 | 1,115 | 1,561 | 5,045 | 7,063 | 7,805 | 35,315 | 225,007 | 1,125,035 | 1,575,049 | 7,875,245 |
| -1 | -5 | -7 | -35 | -223 | -1,009 | -1,115 | -1,561 | -5,045 | -7,063 | -7,805 | -35,315 | -225,007 | -1,125,035 | -1,575,049 | -7,875,245 |
Here are some more numbers to try:
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