A:
Positive:
1 x 1232054455 x 2464108911 x 1120049555 x 2240099277 x 4447851385 x 889573047 x 404358087 x 15235
Negative:
-1 x -123205445-5 x -24641089-11 x -11200495-55 x -2240099-277 x -444785-1385 x -88957-3047 x -40435-8087 x -15235
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 123,205,445, 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 | 123,205,445 | |
| -1 | -123,205,445 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 123,205,445.
Example:
1 x 123,205,445 = 123,205,445
and
-1 x -123,205,445 = 123,205,445
Notice both answers equal 123,205,445
With that explanation out of the way, let's continue. Next, we take the number 123,205,445 and divide it by 2:
123,205,445 ÷ 2 = 61,602,722.5
If the quotient is a whole number, then 2 and 61,602,722.5 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 | 123,205,445 | |
| -1 | -123,205,445 |
Now, we try dividing 123,205,445 by 3:
123,205,445 ÷ 3 = 41,068,481.6667
If the quotient is a whole number, then 3 and 41,068,481.6667 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 | 123,205,445 | |
| -1 | -123,205,445 |
Let's try dividing by 4:
123,205,445 ÷ 4 = 30,801,361.25
If the quotient is a whole number, then 4 and 30,801,361.25 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 | 123,205,445 | |
| -1 | 123,205,445 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 277 | 1,385 | 3,047 | 8,087 | 15,235 | 40,435 | 88,957 | 444,785 | 2,240,099 | 11,200,495 | 24,641,089 | 123,205,445 |
| -1 | -5 | -11 | -55 | -277 | -1,385 | -3,047 | -8,087 | -15,235 | -40,435 | -88,957 | -444,785 | -2,240,099 | -11,200,495 | -24,641,089 | -123,205,445 |
Here are some more numbers to try:
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