A:
Positive:
1 x 1205433855 x 2410867767 x 1799155335 x 359831587 x 205355613 x 1966452935 x 410713065 x 39329
Negative:
-1 x -120543385-5 x -24108677-67 x -1799155-335 x -359831-587 x -205355-613 x -196645-2935 x -41071-3065 x -39329
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 120,543,385, 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 | 120,543,385 | |
| -1 | -120,543,385 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 120,543,385.
Example:
1 x 120,543,385 = 120,543,385
and
-1 x -120,543,385 = 120,543,385
Notice both answers equal 120,543,385
With that explanation out of the way, let's continue. Next, we take the number 120,543,385 and divide it by 2:
120,543,385 ÷ 2 = 60,271,692.5
If the quotient is a whole number, then 2 and 60,271,692.5 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 | 120,543,385 | |
| -1 | -120,543,385 |
Now, we try dividing 120,543,385 by 3:
120,543,385 ÷ 3 = 40,181,128.3333
If the quotient is a whole number, then 3 and 40,181,128.3333 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 | 120,543,385 | |
| -1 | -120,543,385 |
Let's try dividing by 4:
120,543,385 ÷ 4 = 30,135,846.25
If the quotient is a whole number, then 4 and 30,135,846.25 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 | 120,543,385 | |
| -1 | 120,543,385 |
If you did it right, you will end up with this table:
| 1 | 5 | 67 | 335 | 587 | 613 | 2,935 | 3,065 | 39,329 | 41,071 | 196,645 | 205,355 | 359,831 | 1,799,155 | 24,108,677 | 120,543,385 |
| -1 | -5 | -67 | -335 | -587 | -613 | -2,935 | -3,065 | -39,329 | -41,071 | -196,645 | -205,355 | -359,831 | -1,799,155 | -24,108,677 | -120,543,385 |
Here are some more numbers to try:
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