A:
Positive:
1 x 180666655 x 361333317 x 106274543 x 42015585 x 212549215 x 84031731 x 247153655 x 4943
Negative:
-1 x -18066665-5 x -3613333-17 x -1062745-43 x -420155-85 x -212549-215 x -84031-731 x -24715-3655 x -4943
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 18,066,665, 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 | 18,066,665 | |
| -1 | -18,066,665 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 18,066,665.
Example:
1 x 18,066,665 = 18,066,665
and
-1 x -18,066,665 = 18,066,665
Notice both answers equal 18,066,665
With that explanation out of the way, let's continue. Next, we take the number 18,066,665 and divide it by 2:
18,066,665 ÷ 2 = 9,033,332.5
If the quotient is a whole number, then 2 and 9,033,332.5 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 | 18,066,665 | |
| -1 | -18,066,665 |
Now, we try dividing 18,066,665 by 3:
18,066,665 ÷ 3 = 6,022,221.6667
If the quotient is a whole number, then 3 and 6,022,221.6667 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 | 18,066,665 | |
| -1 | -18,066,665 |
Let's try dividing by 4:
18,066,665 ÷ 4 = 4,516,666.25
If the quotient is a whole number, then 4 and 4,516,666.25 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 | 18,066,665 | |
| -1 | 18,066,665 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 43 | 85 | 215 | 731 | 3,655 | 4,943 | 24,715 | 84,031 | 212,549 | 420,155 | 1,062,745 | 3,613,333 | 18,066,665 |
| -1 | -5 | -17 | -43 | -85 | -215 | -731 | -3,655 | -4,943 | -24,715 | -84,031 | -212,549 | -420,155 | -1,062,745 | -3,613,333 | -18,066,665 |
Here are some more numbers to try:
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