A:
Positive:
1 x 16504024911 x 1500365923 x 717566331 x 5323879121 x 1363969253 x 652333341 x 483989713 x 2314731913 x 862732783 x 593033751 x 439997843 x 21043
Negative:
-1 x -165040249-11 x -15003659-23 x -7175663-31 x -5323879-121 x -1363969-253 x -652333-341 x -483989-713 x -231473-1913 x -86273-2783 x -59303-3751 x -43999-7843 x -21043
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 165,040,249, 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 | 165,040,249 | |
| -1 | -165,040,249 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 165,040,249.
Example:
1 x 165,040,249 = 165,040,249
and
-1 x -165,040,249 = 165,040,249
Notice both answers equal 165,040,249
With that explanation out of the way, let's continue. Next, we take the number 165,040,249 and divide it by 2:
165,040,249 ÷ 2 = 82,520,124.5
If the quotient is a whole number, then 2 and 82,520,124.5 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 | 165,040,249 | |
| -1 | -165,040,249 |
Now, we try dividing 165,040,249 by 3:
165,040,249 ÷ 3 = 55,013,416.3333
If the quotient is a whole number, then 3 and 55,013,416.3333 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 | 165,040,249 | |
| -1 | -165,040,249 |
Let's try dividing by 4:
165,040,249 ÷ 4 = 41,260,062.25
If the quotient is a whole number, then 4 and 41,260,062.25 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 | 165,040,249 | |
| -1 | 165,040,249 |
If you did it right, you will end up with this table:
| 1 | 11 | 23 | 31 | 121 | 253 | 341 | 713 | 1,913 | 2,783 | 3,751 | 7,843 | 21,043 | 43,999 | 59,303 | 86,273 | 231,473 | 483,989 | 652,333 | 1,363,969 | 5,323,879 | 7,175,663 | 15,003,659 | 165,040,249 |
| -1 | -11 | -23 | -31 | -121 | -253 | -341 | -713 | -1,913 | -2,783 | -3,751 | -7,843 | -21,043 | -43,999 | -59,303 | -86,273 | -231,473 | -483,989 | -652,333 | -1,363,969 | -5,323,879 | -7,175,663 | -15,003,659 | -165,040,249 |
Here are some more numbers to try:
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