A:
Positive:
1 x 207543055 x 415086111 x 188675513 x 159648555 x 37735165 x 319297143 x 145135715 x 29027
Negative:
-1 x -20754305-5 x -4150861-11 x -1886755-13 x -1596485-55 x -377351-65 x -319297-143 x -145135-715 x -29027
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 20,754,305, 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 | 20,754,305 | |
| -1 | -20,754,305 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,754,305.
Example:
1 x 20,754,305 = 20,754,305
and
-1 x -20,754,305 = 20,754,305
Notice both answers equal 20,754,305
With that explanation out of the way, let's continue. Next, we take the number 20,754,305 and divide it by 2:
20,754,305 ÷ 2 = 10,377,152.5
If the quotient is a whole number, then 2 and 10,377,152.5 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 | 20,754,305 | |
| -1 | -20,754,305 |
Now, we try dividing 20,754,305 by 3:
20,754,305 ÷ 3 = 6,918,101.6667
If the quotient is a whole number, then 3 and 6,918,101.6667 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 | 20,754,305 | |
| -1 | -20,754,305 |
Let's try dividing by 4:
20,754,305 ÷ 4 = 5,188,576.25
If the quotient is a whole number, then 4 and 5,188,576.25 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 | 20,754,305 | |
| -1 | 20,754,305 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 13 | 55 | 65 | 143 | 715 | 29,027 | 145,135 | 319,297 | 377,351 | 1,596,485 | 1,886,755 | 4,150,861 | 20,754,305 |
| -1 | -5 | -11 | -13 | -55 | -65 | -143 | -715 | -29,027 | -145,135 | -319,297 | -377,351 | -1,596,485 | -1,886,755 | -4,150,861 | -20,754,305 |
Here are some more numbers to try:
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