A:
Positive:
1 x 200311255 x 400622525 x 801245125 x 160249191 x 104875839 x 23875955 x 209754195 x 4775
Negative:
-1 x -20031125-5 x -4006225-25 x -801245-125 x -160249-191 x -104875-839 x -23875-955 x -20975-4195 x -4775
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 20,031,125, 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 | 20,031,125 | |
| -1 | -20,031,125 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,031,125.
Example:
1 x 20,031,125 = 20,031,125
and
-1 x -20,031,125 = 20,031,125
Notice both answers equal 20,031,125
With that explanation out of the way, let's continue. Next, we take the number 20,031,125 and divide it by 2:
20,031,125 ÷ 2 = 10,015,562.5
If the quotient is a whole number, then 2 and 10,015,562.5 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 | 20,031,125 | |
| -1 | -20,031,125 |
Now, we try dividing 20,031,125 by 3:
20,031,125 ÷ 3 = 6,677,041.6667
If the quotient is a whole number, then 3 and 6,677,041.6667 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 | 20,031,125 | |
| -1 | -20,031,125 |
Let's try dividing by 4:
20,031,125 ÷ 4 = 5,007,781.25
If the quotient is a whole number, then 4 and 5,007,781.25 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 | 20,031,125 | |
| -1 | 20,031,125 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 125 | 191 | 839 | 955 | 4,195 | 4,775 | 20,975 | 23,875 | 104,875 | 160,249 | 801,245 | 4,006,225 | 20,031,125 |
| -1 | -5 | -25 | -125 | -191 | -839 | -955 | -4,195 | -4,775 | -20,975 | -23,875 | -104,875 | -160,249 | -801,245 | -4,006,225 | -20,031,125 |
Here are some more numbers to try:
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