A:
Positive:
1 x 160166055 x 320332111 x 145605555 x 291211127 x 126115635 x 252231397 x 114652293 x 6985
Negative:
-1 x -16016605-5 x -3203321-11 x -1456055-55 x -291211-127 x -126115-635 x -25223-1397 x -11465-2293 x -6985
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 16,016,605, 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 | 16,016,605 | |
| -1 | -16,016,605 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 16,016,605.
Example:
1 x 16,016,605 = 16,016,605
and
-1 x -16,016,605 = 16,016,605
Notice both answers equal 16,016,605
With that explanation out of the way, let's continue. Next, we take the number 16,016,605 and divide it by 2:
16,016,605 ÷ 2 = 8,008,302.5
If the quotient is a whole number, then 2 and 8,008,302.5 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 | 16,016,605 | |
| -1 | -16,016,605 |
Now, we try dividing 16,016,605 by 3:
16,016,605 ÷ 3 = 5,338,868.3333
If the quotient is a whole number, then 3 and 5,338,868.3333 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 | 16,016,605 | |
| -1 | -16,016,605 |
Let's try dividing by 4:
16,016,605 ÷ 4 = 4,004,151.25
If the quotient is a whole number, then 4 and 4,004,151.25 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 | 16,016,605 | |
| -1 | 16,016,605 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 127 | 635 | 1,397 | 2,293 | 6,985 | 11,465 | 25,223 | 126,115 | 291,211 | 1,456,055 | 3,203,321 | 16,016,605 |
| -1 | -5 | -11 | -55 | -127 | -635 | -1,397 | -2,293 | -6,985 | -11,465 | -25,223 | -126,115 | -291,211 | -1,456,055 | -3,203,321 | -16,016,605 |
Here are some more numbers to try:
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