A:
Positive:
1 x 165111055 x 330222113 x 127008565 x 254017389 x 42445653 x 252851945 x 84893265 x 5057
Negative:
-1 x -16511105-5 x -3302221-13 x -1270085-65 x -254017-389 x -42445-653 x -25285-1945 x -8489-3265 x -5057
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 16,511,105, 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 | 16,511,105 | |
| -1 | -16,511,105 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 16,511,105.
Example:
1 x 16,511,105 = 16,511,105
and
-1 x -16,511,105 = 16,511,105
Notice both answers equal 16,511,105
With that explanation out of the way, let's continue. Next, we take the number 16,511,105 and divide it by 2:
16,511,105 ÷ 2 = 8,255,552.5
If the quotient is a whole number, then 2 and 8,255,552.5 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 | 16,511,105 | |
| -1 | -16,511,105 |
Now, we try dividing 16,511,105 by 3:
16,511,105 ÷ 3 = 5,503,701.6667
If the quotient is a whole number, then 3 and 5,503,701.6667 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 | 16,511,105 | |
| -1 | -16,511,105 |
Let's try dividing by 4:
16,511,105 ÷ 4 = 4,127,776.25
If the quotient is a whole number, then 4 and 4,127,776.25 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 | 16,511,105 | |
| -1 | 16,511,105 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 389 | 653 | 1,945 | 3,265 | 5,057 | 8,489 | 25,285 | 42,445 | 254,017 | 1,270,085 | 3,302,221 | 16,511,105 |
| -1 | -5 | -13 | -65 | -389 | -653 | -1,945 | -3,265 | -5,057 | -8,489 | -25,285 | -42,445 | -254,017 | -1,270,085 | -3,302,221 | -16,511,105 |
Here are some more numbers to try:
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