A:
Positive:
1 x 120904077 x 172720149 x 246743101 x 119707343 x 35249349 x 34643707 x 171012443 x 4949
Negative:
-1 x -12090407-7 x -1727201-49 x -246743-101 x -119707-343 x -35249-349 x -34643-707 x -17101-2443 x -4949
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 12,090,407, 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 | 12,090,407 | |
| -1 | -12,090,407 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,090,407.
Example:
1 x 12,090,407 = 12,090,407
and
-1 x -12,090,407 = 12,090,407
Notice both answers equal 12,090,407
With that explanation out of the way, let's continue. Next, we take the number 12,090,407 and divide it by 2:
12,090,407 ÷ 2 = 6,045,203.5
If the quotient is a whole number, then 2 and 6,045,203.5 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 | 12,090,407 | |
| -1 | -12,090,407 |
Now, we try dividing 12,090,407 by 3:
12,090,407 ÷ 3 = 4,030,135.6667
If the quotient is a whole number, then 3 and 4,030,135.6667 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 | 12,090,407 | |
| -1 | -12,090,407 |
Let's try dividing by 4:
12,090,407 ÷ 4 = 3,022,601.75
If the quotient is a whole number, then 4 and 3,022,601.75 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 | 12,090,407 | |
| -1 | 12,090,407 |
If you did it right, you will end up with this table:
| 1 | 7 | 49 | 101 | 343 | 349 | 707 | 2,443 | 4,949 | 17,101 | 34,643 | 35,249 | 119,707 | 246,743 | 1,727,201 | 12,090,407 |
| -1 | -7 | -49 | -101 | -343 | -349 | -707 | -2,443 | -4,949 | -17,101 | -34,643 | -35,249 | -119,707 | -246,743 | -1,727,201 | -12,090,407 |
Here are some more numbers to try:
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