A:
Positive:
1 x 202321217 x 289030313 x 155631791 x 222331223 x 90727997 x 202931561 x 129612899 x 6979
Negative:
-1 x -20232121-7 x -2890303-13 x -1556317-91 x -222331-223 x -90727-997 x -20293-1561 x -12961-2899 x -6979
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 20,232,121, 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 | 20,232,121 | |
| -1 | -20,232,121 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,232,121.
Example:
1 x 20,232,121 = 20,232,121
and
-1 x -20,232,121 = 20,232,121
Notice both answers equal 20,232,121
With that explanation out of the way, let's continue. Next, we take the number 20,232,121 and divide it by 2:
20,232,121 ÷ 2 = 10,116,060.5
If the quotient is a whole number, then 2 and 10,116,060.5 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 | 20,232,121 | |
| -1 | -20,232,121 |
Now, we try dividing 20,232,121 by 3:
20,232,121 ÷ 3 = 6,744,040.3333
If the quotient is a whole number, then 3 and 6,744,040.3333 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 | 20,232,121 | |
| -1 | -20,232,121 |
Let's try dividing by 4:
20,232,121 ÷ 4 = 5,058,030.25
If the quotient is a whole number, then 4 and 5,058,030.25 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 | 20,232,121 | |
| -1 | 20,232,121 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 91 | 223 | 997 | 1,561 | 2,899 | 6,979 | 12,961 | 20,293 | 90,727 | 222,331 | 1,556,317 | 2,890,303 | 20,232,121 |
| -1 | -7 | -13 | -91 | -223 | -997 | -1,561 | -2,899 | -6,979 | -12,961 | -20,293 | -90,727 | -222,331 | -1,556,317 | -2,890,303 | -20,232,121 |
Here are some more numbers to try:
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