A:
Positive:
1 x 161665217 x 230950337 x 43693349 x 329929241 x 67081259 x 624191369 x 118091687 x 95831813 x 8917
Negative:
-1 x -16166521-7 x -2309503-37 x -436933-49 x -329929-241 x -67081-259 x -62419-1369 x -11809-1687 x -9583-1813 x -8917
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 16,166,521, 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 | 16,166,521 | |
| -1 | -16,166,521 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 16,166,521.
Example:
1 x 16,166,521 = 16,166,521
and
-1 x -16,166,521 = 16,166,521
Notice both answers equal 16,166,521
With that explanation out of the way, let's continue. Next, we take the number 16,166,521 and divide it by 2:
16,166,521 ÷ 2 = 8,083,260.5
If the quotient is a whole number, then 2 and 8,083,260.5 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 | 16,166,521 | |
| -1 | -16,166,521 |
Now, we try dividing 16,166,521 by 3:
16,166,521 ÷ 3 = 5,388,840.3333
If the quotient is a whole number, then 3 and 5,388,840.3333 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 | 16,166,521 | |
| -1 | -16,166,521 |
Let's try dividing by 4:
16,166,521 ÷ 4 = 4,041,630.25
If the quotient is a whole number, then 4 and 4,041,630.25 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 | 16,166,521 | |
| -1 | 16,166,521 |
If you did it right, you will end up with this table:
| 1 | 7 | 37 | 49 | 241 | 259 | 1,369 | 1,687 | 1,813 | 8,917 | 9,583 | 11,809 | 62,419 | 67,081 | 329,929 | 436,933 | 2,309,503 | 16,166,521 |
| -1 | -7 | -37 | -49 | -241 | -259 | -1,369 | -1,687 | -1,813 | -8,917 | -9,583 | -11,809 | -62,419 | -67,081 | -329,929 | -436,933 | -2,309,503 | -16,166,521 |
Here are some more numbers to try:
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