A:
Positive:
1 x 128112055 x 256224111 x 116465543 x 29793555 x 232931215 x 59587473 x 270852365 x 5417
Negative:
-1 x -12811205-5 x -2562241-11 x -1164655-43 x -297935-55 x -232931-215 x -59587-473 x -27085-2365 x -5417
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 12,811,205, 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 | 12,811,205 | |
| -1 | -12,811,205 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,811,205.
Example:
1 x 12,811,205 = 12,811,205
and
-1 x -12,811,205 = 12,811,205
Notice both answers equal 12,811,205
With that explanation out of the way, let's continue. Next, we take the number 12,811,205 and divide it by 2:
12,811,205 ÷ 2 = 6,405,602.5
If the quotient is a whole number, then 2 and 6,405,602.5 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 | 12,811,205 | |
| -1 | -12,811,205 |
Now, we try dividing 12,811,205 by 3:
12,811,205 ÷ 3 = 4,270,401.6667
If the quotient is a whole number, then 3 and 4,270,401.6667 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 | 12,811,205 | |
| -1 | -12,811,205 |
Let's try dividing by 4:
12,811,205 ÷ 4 = 3,202,801.25
If the quotient is a whole number, then 4 and 3,202,801.25 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 | 12,811,205 | |
| -1 | 12,811,205 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 43 | 55 | 215 | 473 | 2,365 | 5,417 | 27,085 | 59,587 | 232,931 | 297,935 | 1,164,655 | 2,562,241 | 12,811,205 |
| -1 | -5 | -11 | -43 | -55 | -215 | -473 | -2,365 | -5,417 | -27,085 | -59,587 | -232,931 | -297,935 | -1,164,655 | -2,562,241 | -12,811,205 |
Here are some more numbers to try:
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