A:
Positive:
1 x 1650665055 x 3301330173 x 2261185137 x 1204865365 x 452237685 x 2409733301 x 5000510001 x 16505
Negative:
-1 x -165066505-5 x -33013301-73 x -2261185-137 x -1204865-365 x -452237-685 x -240973-3301 x -50005-10001 x -16505
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 165,066,505, 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 | 165,066,505 | |
| -1 | -165,066,505 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 165,066,505.
Example:
1 x 165,066,505 = 165,066,505
and
-1 x -165,066,505 = 165,066,505
Notice both answers equal 165,066,505
With that explanation out of the way, let's continue. Next, we take the number 165,066,505 and divide it by 2:
165,066,505 ÷ 2 = 82,533,252.5
If the quotient is a whole number, then 2 and 82,533,252.5 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 | 165,066,505 | |
| -1 | -165,066,505 |
Now, we try dividing 165,066,505 by 3:
165,066,505 ÷ 3 = 55,022,168.3333
If the quotient is a whole number, then 3 and 55,022,168.3333 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 | 165,066,505 | |
| -1 | -165,066,505 |
Let's try dividing by 4:
165,066,505 ÷ 4 = 41,266,626.25
If the quotient is a whole number, then 4 and 41,266,626.25 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 | 165,066,505 | |
| -1 | 165,066,505 |
If you did it right, you will end up with this table:
| 1 | 5 | 73 | 137 | 365 | 685 | 3,301 | 10,001 | 16,505 | 50,005 | 240,973 | 452,237 | 1,204,865 | 2,261,185 | 33,013,301 | 165,066,505 |
| -1 | -5 | -73 | -137 | -365 | -685 | -3,301 | -10,001 | -16,505 | -50,005 | -240,973 | -452,237 | -1,204,865 | -2,261,185 | -33,013,301 | -165,066,505 |
Here are some more numbers to try:
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