A:
Positive:
1 x 131294155 x 262588313 x 100995565 x 20199173 x 179855365 x 35971949 x 138352767 x 4745
Negative:
-1 x -13129415-5 x -2625883-13 x -1009955-65 x -201991-73 x -179855-365 x -35971-949 x -13835-2767 x -4745
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 13,129,415, 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 | 13,129,415 | |
| -1 | -13,129,415 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 13,129,415.
Example:
1 x 13,129,415 = 13,129,415
and
-1 x -13,129,415 = 13,129,415
Notice both answers equal 13,129,415
With that explanation out of the way, let's continue. Next, we take the number 13,129,415 and divide it by 2:
13,129,415 ÷ 2 = 6,564,707.5
If the quotient is a whole number, then 2 and 6,564,707.5 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 | 13,129,415 | |
| -1 | -13,129,415 |
Now, we try dividing 13,129,415 by 3:
13,129,415 ÷ 3 = 4,376,471.6667
If the quotient is a whole number, then 3 and 4,376,471.6667 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 | 13,129,415 | |
| -1 | -13,129,415 |
Let's try dividing by 4:
13,129,415 ÷ 4 = 3,282,353.75
If the quotient is a whole number, then 4 and 3,282,353.75 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 | 13,129,415 | |
| -1 | 13,129,415 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 73 | 365 | 949 | 2,767 | 4,745 | 13,835 | 35,971 | 179,855 | 201,991 | 1,009,955 | 2,625,883 | 13,129,415 |
| -1 | -5 | -13 | -65 | -73 | -365 | -949 | -2,767 | -4,745 | -13,835 | -35,971 | -179,855 | -201,991 | -1,009,955 | -2,625,883 | -13,129,415 |
Here are some more numbers to try:
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