A:
Positive:
1 x 1215026455 x 2430052911 x 1104569555 x 2209139163 x 745415815 x 1490831793 x 677658965 x 13553
Negative:
-1 x -121502645-5 x -24300529-11 x -11045695-55 x -2209139-163 x -745415-815 x -149083-1793 x -67765-8965 x -13553
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 121,502,645, 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 | 121,502,645 | |
| -1 | -121,502,645 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 121,502,645.
Example:
1 x 121,502,645 = 121,502,645
and
-1 x -121,502,645 = 121,502,645
Notice both answers equal 121,502,645
With that explanation out of the way, let's continue. Next, we take the number 121,502,645 and divide it by 2:
121,502,645 ÷ 2 = 60,751,322.5
If the quotient is a whole number, then 2 and 60,751,322.5 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 | 121,502,645 | |
| -1 | -121,502,645 |
Now, we try dividing 121,502,645 by 3:
121,502,645 ÷ 3 = 40,500,881.6667
If the quotient is a whole number, then 3 and 40,500,881.6667 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 | 121,502,645 | |
| -1 | -121,502,645 |
Let's try dividing by 4:
121,502,645 ÷ 4 = 30,375,661.25
If the quotient is a whole number, then 4 and 30,375,661.25 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 | 121,502,645 | |
| -1 | 121,502,645 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 163 | 815 | 1,793 | 8,965 | 13,553 | 67,765 | 149,083 | 745,415 | 2,209,139 | 11,045,695 | 24,300,529 | 121,502,645 |
| -1 | -5 | -11 | -55 | -163 | -815 | -1,793 | -8,965 | -13,553 | -67,765 | -149,083 | -745,415 | -2,209,139 | -11,045,695 | -24,300,529 | -121,502,645 |
Here are some more numbers to try:
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