A:
Positive:
1 x 16566550319 x 8719237109 x 1519867167 x 992009479 x 3458572071 x 799933173 x 522119101 x 18203
Negative:
-1 x -165665503-19 x -8719237-109 x -1519867-167 x -992009-479 x -345857-2071 x -79993-3173 x -52211-9101 x -18203
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 165,665,503, 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 | 165,665,503 | |
| -1 | -165,665,503 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 165,665,503.
Example:
1 x 165,665,503 = 165,665,503
and
-1 x -165,665,503 = 165,665,503
Notice both answers equal 165,665,503
With that explanation out of the way, let's continue. Next, we take the number 165,665,503 and divide it by 2:
165,665,503 ÷ 2 = 82,832,751.5
If the quotient is a whole number, then 2 and 82,832,751.5 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 | 165,665,503 | |
| -1 | -165,665,503 |
Now, we try dividing 165,665,503 by 3:
165,665,503 ÷ 3 = 55,221,834.3333
If the quotient is a whole number, then 3 and 55,221,834.3333 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 | 165,665,503 | |
| -1 | -165,665,503 |
Let's try dividing by 4:
165,665,503 ÷ 4 = 41,416,375.75
If the quotient is a whole number, then 4 and 41,416,375.75 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 | 165,665,503 | |
| -1 | 165,665,503 |
If you did it right, you will end up with this table:
| 1 | 19 | 109 | 167 | 479 | 2,071 | 3,173 | 9,101 | 18,203 | 52,211 | 79,993 | 345,857 | 992,009 | 1,519,867 | 8,719,237 | 165,665,503 |
| -1 | -19 | -109 | -167 | -479 | -2,071 | -3,173 | -9,101 | -18,203 | -52,211 | -79,993 | -345,857 | -992,009 | -1,519,867 | -8,719,237 | -165,665,503 |
Here are some more numbers to try:
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