A:
Positive:
1 x 12324022113 x 948001731 x 3975491103 x 1196507403 x 3058071339 x 920392969 x 415093193 x 38597
Negative:
-1 x -123240221-13 x -9480017-31 x -3975491-103 x -1196507-403 x -305807-1339 x -92039-2969 x -41509-3193 x -38597
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 123,240,221, 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 | 123,240,221 | |
| -1 | -123,240,221 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 123,240,221.
Example:
1 x 123,240,221 = 123,240,221
and
-1 x -123,240,221 = 123,240,221
Notice both answers equal 123,240,221
With that explanation out of the way, let's continue. Next, we take the number 123,240,221 and divide it by 2:
123,240,221 ÷ 2 = 61,620,110.5
If the quotient is a whole number, then 2 and 61,620,110.5 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 | 123,240,221 | |
| -1 | -123,240,221 |
Now, we try dividing 123,240,221 by 3:
123,240,221 ÷ 3 = 41,080,073.6667
If the quotient is a whole number, then 3 and 41,080,073.6667 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 | 123,240,221 | |
| -1 | -123,240,221 |
Let's try dividing by 4:
123,240,221 ÷ 4 = 30,810,055.25
If the quotient is a whole number, then 4 and 30,810,055.25 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 | 123,240,221 | |
| -1 | 123,240,221 |
If you did it right, you will end up with this table:
| 1 | 13 | 31 | 103 | 403 | 1,339 | 2,969 | 3,193 | 38,597 | 41,509 | 92,039 | 305,807 | 1,196,507 | 3,975,491 | 9,480,017 | 123,240,221 |
| -1 | -13 | -31 | -103 | -403 | -1,339 | -2,969 | -3,193 | -38,597 | -41,509 | -92,039 | -305,807 | -1,196,507 | -3,975,491 | -9,480,017 | -123,240,221 |
Here are some more numbers to try:
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