A:
Positive:
1 x 206276655 x 412553323 x 896855115 x 179371181 x 113965905 x 22793991 x 208154163 x 4955
Negative:
-1 x -20627665-5 x -4125533-23 x -896855-115 x -179371-181 x -113965-905 x -22793-991 x -20815-4163 x -4955
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 20,627,665, 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 | 20,627,665 | |
| -1 | -20,627,665 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,627,665.
Example:
1 x 20,627,665 = 20,627,665
and
-1 x -20,627,665 = 20,627,665
Notice both answers equal 20,627,665
With that explanation out of the way, let's continue. Next, we take the number 20,627,665 and divide it by 2:
20,627,665 ÷ 2 = 10,313,832.5
If the quotient is a whole number, then 2 and 10,313,832.5 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 | 20,627,665 | |
| -1 | -20,627,665 |
Now, we try dividing 20,627,665 by 3:
20,627,665 ÷ 3 = 6,875,888.3333
If the quotient is a whole number, then 3 and 6,875,888.3333 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 | 20,627,665 | |
| -1 | -20,627,665 |
Let's try dividing by 4:
20,627,665 ÷ 4 = 5,156,916.25
If the quotient is a whole number, then 4 and 5,156,916.25 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 | 20,627,665 | |
| -1 | 20,627,665 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 115 | 181 | 905 | 991 | 4,163 | 4,955 | 20,815 | 22,793 | 113,965 | 179,371 | 896,855 | 4,125,533 | 20,627,665 |
| -1 | -5 | -23 | -115 | -181 | -905 | -991 | -4,163 | -4,955 | -20,815 | -22,793 | -113,965 | -179,371 | -896,855 | -4,125,533 | -20,627,665 |
Here are some more numbers to try:
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