A:
Positive:
1 x 201056877 x 28722411667 x 120611723 x 11669
Negative:
-1 x -20105687-7 x -2872241-1667 x -12061-1723 x -11669
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 20,105,687, 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 | 20,105,687 | |
| -1 | -20,105,687 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,105,687.
Example:
1 x 20,105,687 = 20,105,687
and
-1 x -20,105,687 = 20,105,687
Notice both answers equal 20,105,687
With that explanation out of the way, let's continue. Next, we take the number 20,105,687 and divide it by 2:
20,105,687 ÷ 2 = 10,052,843.5
If the quotient is a whole number, then 2 and 10,052,843.5 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 | 20,105,687 | |
| -1 | -20,105,687 |
Now, we try dividing 20,105,687 by 3:
20,105,687 ÷ 3 = 6,701,895.6667
If the quotient is a whole number, then 3 and 6,701,895.6667 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 | 20,105,687 | |
| -1 | -20,105,687 |
Let's try dividing by 4:
20,105,687 ÷ 4 = 5,026,421.75
If the quotient is a whole number, then 4 and 5,026,421.75 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 | 20,105,687 | |
| -1 | 20,105,687 |
If you did it right, you will end up with this table:
| 1 | 7 | 1,667 | 1,723 | 11,669 | 12,061 | 2,872,241 | 20,105,687 |
| -1 | -7 | -1,667 | -1,723 | -11,669 | -12,061 | -2,872,241 | -20,105,687 |
Here are some more numbers to try:
Try the factor calculator