A:
Positive:
1 x 1205532655 x 241106537 x 1722189531 x 388881535 x 3444379155 x 777763217 x 5555451085 x 111109
Negative:
-1 x -120553265-5 x -24110653-7 x -17221895-31 x -3888815-35 x -3444379-155 x -777763-217 x -555545-1085 x -111109
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 120,553,265, 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 | 120,553,265 | |
| -1 | -120,553,265 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 120,553,265.
Example:
1 x 120,553,265 = 120,553,265
and
-1 x -120,553,265 = 120,553,265
Notice both answers equal 120,553,265
With that explanation out of the way, let's continue. Next, we take the number 120,553,265 and divide it by 2:
120,553,265 ÷ 2 = 60,276,632.5
If the quotient is a whole number, then 2 and 60,276,632.5 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 | 120,553,265 | |
| -1 | -120,553,265 |
Now, we try dividing 120,553,265 by 3:
120,553,265 ÷ 3 = 40,184,421.6667
If the quotient is a whole number, then 3 and 40,184,421.6667 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 | 120,553,265 | |
| -1 | -120,553,265 |
Let's try dividing by 4:
120,553,265 ÷ 4 = 30,138,316.25
If the quotient is a whole number, then 4 and 30,138,316.25 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 | 120,553,265 | |
| -1 | 120,553,265 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 31 | 35 | 155 | 217 | 1,085 | 111,109 | 555,545 | 777,763 | 3,444,379 | 3,888,815 | 17,221,895 | 24,110,653 | 120,553,265 |
| -1 | -5 | -7 | -31 | -35 | -155 | -217 | -1,085 | -111,109 | -555,545 | -777,763 | -3,444,379 | -3,888,815 | -17,221,895 | -24,110,653 | -120,553,265 |
Here are some more numbers to try:
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