A:
Positive:
1 x 123079155 x 246158317 x 72399519 x 64778585 x 14479995 x 129557323 x 381051615 x 7621
Negative:
-1 x -12307915-5 x -2461583-17 x -723995-19 x -647785-85 x -144799-95 x -129557-323 x -38105-1615 x -7621
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 12,307,915, 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 | 12,307,915 | |
| -1 | -12,307,915 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,307,915.
Example:
1 x 12,307,915 = 12,307,915
and
-1 x -12,307,915 = 12,307,915
Notice both answers equal 12,307,915
With that explanation out of the way, let's continue. Next, we take the number 12,307,915 and divide it by 2:
12,307,915 ÷ 2 = 6,153,957.5
If the quotient is a whole number, then 2 and 6,153,957.5 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 | 12,307,915 | |
| -1 | -12,307,915 |
Now, we try dividing 12,307,915 by 3:
12,307,915 ÷ 3 = 4,102,638.3333
If the quotient is a whole number, then 3 and 4,102,638.3333 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 | 12,307,915 | |
| -1 | -12,307,915 |
Let's try dividing by 4:
12,307,915 ÷ 4 = 3,076,978.75
If the quotient is a whole number, then 4 and 3,076,978.75 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 | 12,307,915 | |
| -1 | 12,307,915 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 19 | 85 | 95 | 323 | 1,615 | 7,621 | 38,105 | 129,557 | 144,799 | 647,785 | 723,995 | 2,461,583 | 12,307,915 |
| -1 | -5 | -17 | -19 | -85 | -95 | -323 | -1,615 | -7,621 | -38,105 | -129,557 | -144,799 | -647,785 | -723,995 | -2,461,583 | -12,307,915 |
Here are some more numbers to try:
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