A:
Positive:
1 x 205585737 x 293693923 x 893851149 x 137977161 x 127693857 x 239891043 x 197113427 x 5999
Negative:
-1 x -20558573-7 x -2936939-23 x -893851-149 x -137977-161 x -127693-857 x -23989-1043 x -19711-3427 x -5999
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 20,558,573, 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 | 20,558,573 | |
| -1 | -20,558,573 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,558,573.
Example:
1 x 20,558,573 = 20,558,573
and
-1 x -20,558,573 = 20,558,573
Notice both answers equal 20,558,573
With that explanation out of the way, let's continue. Next, we take the number 20,558,573 and divide it by 2:
20,558,573 ÷ 2 = 10,279,286.5
If the quotient is a whole number, then 2 and 10,279,286.5 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 | 20,558,573 | |
| -1 | -20,558,573 |
Now, we try dividing 20,558,573 by 3:
20,558,573 ÷ 3 = 6,852,857.6667
If the quotient is a whole number, then 3 and 6,852,857.6667 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 | 20,558,573 | |
| -1 | -20,558,573 |
Let's try dividing by 4:
20,558,573 ÷ 4 = 5,139,643.25
If the quotient is a whole number, then 4 and 5,139,643.25 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 | 20,558,573 | |
| -1 | 20,558,573 |
If you did it right, you will end up with this table:
| 1 | 7 | 23 | 149 | 161 | 857 | 1,043 | 3,427 | 5,999 | 19,711 | 23,989 | 127,693 | 137,977 | 893,851 | 2,936,939 | 20,558,573 |
| -1 | -7 | -23 | -149 | -161 | -857 | -1,043 | -3,427 | -5,999 | -19,711 | -23,989 | -127,693 | -137,977 | -893,851 | -2,936,939 | -20,558,573 |
Here are some more numbers to try:
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