A:
Positive:
1 x 166211655 x 332423311 x 151101555 x 30220383 x 200255121 x 137365331 x 50215415 x 40051605 x 27473913 x 182051655 x 100433641 x 4565
Negative:
-1 x -16621165-5 x -3324233-11 x -1511015-55 x -302203-83 x -200255-121 x -137365-331 x -50215-415 x -40051-605 x -27473-913 x -18205-1655 x -10043-3641 x -4565
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 16,621,165, 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 | 16,621,165 | |
| -1 | -16,621,165 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 16,621,165.
Example:
1 x 16,621,165 = 16,621,165
and
-1 x -16,621,165 = 16,621,165
Notice both answers equal 16,621,165
With that explanation out of the way, let's continue. Next, we take the number 16,621,165 and divide it by 2:
16,621,165 ÷ 2 = 8,310,582.5
If the quotient is a whole number, then 2 and 8,310,582.5 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 | 16,621,165 | |
| -1 | -16,621,165 |
Now, we try dividing 16,621,165 by 3:
16,621,165 ÷ 3 = 5,540,388.3333
If the quotient is a whole number, then 3 and 5,540,388.3333 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 | 16,621,165 | |
| -1 | -16,621,165 |
Let's try dividing by 4:
16,621,165 ÷ 4 = 4,155,291.25
If the quotient is a whole number, then 4 and 4,155,291.25 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 | 16,621,165 | |
| -1 | 16,621,165 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 83 | 121 | 331 | 415 | 605 | 913 | 1,655 | 3,641 | 4,565 | 10,043 | 18,205 | 27,473 | 40,051 | 50,215 | 137,365 | 200,255 | 302,203 | 1,511,015 | 3,324,233 | 16,621,165 |
| -1 | -5 | -11 | -55 | -83 | -121 | -331 | -415 | -605 | -913 | -1,655 | -3,641 | -4,565 | -10,043 | -18,205 | -27,473 | -40,051 | -50,215 | -137,365 | -200,255 | -302,203 | -1,511,015 | -3,324,233 | -16,621,165 |
Here are some more numbers to try:
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