A:
Positive:
1 x 208067355 x 416134731 x 671185155 x 134237241 x 86335557 x 373551205 x 172672785 x 7471
Negative:
-1 x -20806735-5 x -4161347-31 x -671185-155 x -134237-241 x -86335-557 x -37355-1205 x -17267-2785 x -7471
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 20,806,735, 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 | 20,806,735 | |
| -1 | -20,806,735 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,806,735.
Example:
1 x 20,806,735 = 20,806,735
and
-1 x -20,806,735 = 20,806,735
Notice both answers equal 20,806,735
With that explanation out of the way, let's continue. Next, we take the number 20,806,735 and divide it by 2:
20,806,735 ÷ 2 = 10,403,367.5
If the quotient is a whole number, then 2 and 10,403,367.5 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 | 20,806,735 | |
| -1 | -20,806,735 |
Now, we try dividing 20,806,735 by 3:
20,806,735 ÷ 3 = 6,935,578.3333
If the quotient is a whole number, then 3 and 6,935,578.3333 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 | 20,806,735 | |
| -1 | -20,806,735 |
Let's try dividing by 4:
20,806,735 ÷ 4 = 5,201,683.75
If the quotient is a whole number, then 4 and 5,201,683.75 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 | 20,806,735 | |
| -1 | 20,806,735 |
If you did it right, you will end up with this table:
| 1 | 5 | 31 | 155 | 241 | 557 | 1,205 | 2,785 | 7,471 | 17,267 | 37,355 | 86,335 | 134,237 | 671,185 | 4,161,347 | 20,806,735 |
| -1 | -5 | -31 | -155 | -241 | -557 | -1,205 | -2,785 | -7,471 | -17,267 | -37,355 | -86,335 | -134,237 | -671,185 | -4,161,347 | -20,806,735 |
Here are some more numbers to try:
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