A:
Positive:
1 x 179901655 x 359803317 x 105824585 x 211649113 x 159205565 x 318411873 x 96051921 x 9365
Negative:
-1 x -17990165-5 x -3598033-17 x -1058245-85 x -211649-113 x -159205-565 x -31841-1873 x -9605-1921 x -9365
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 17,990,165, 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 | 17,990,165 | |
| -1 | -17,990,165 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 17,990,165.
Example:
1 x 17,990,165 = 17,990,165
and
-1 x -17,990,165 = 17,990,165
Notice both answers equal 17,990,165
With that explanation out of the way, let's continue. Next, we take the number 17,990,165 and divide it by 2:
17,990,165 ÷ 2 = 8,995,082.5
If the quotient is a whole number, then 2 and 8,995,082.5 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 | 17,990,165 | |
| -1 | -17,990,165 |
Now, we try dividing 17,990,165 by 3:
17,990,165 ÷ 3 = 5,996,721.6667
If the quotient is a whole number, then 3 and 5,996,721.6667 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 | 17,990,165 | |
| -1 | -17,990,165 |
Let's try dividing by 4:
17,990,165 ÷ 4 = 4,497,541.25
If the quotient is a whole number, then 4 and 4,497,541.25 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 | 17,990,165 | |
| -1 | 17,990,165 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 85 | 113 | 565 | 1,873 | 1,921 | 9,365 | 9,605 | 31,841 | 159,205 | 211,649 | 1,058,245 | 3,598,033 | 17,990,165 |
| -1 | -5 | -17 | -85 | -113 | -565 | -1,873 | -1,921 | -9,365 | -9,605 | -31,841 | -159,205 | -211,649 | -1,058,245 | -3,598,033 | -17,990,165 |
Here are some more numbers to try:
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