A:
Positive:
1 x 28027093913 x 2155930323 x 12185693299 x 937361929 x 3016911009 x 27777112077 x 2320713117 x 21367
Negative:
-1 x -280270939-13 x -21559303-23 x -12185693-299 x -937361-929 x -301691-1009 x -277771-12077 x -23207-13117 x -21367
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 280,270,939, 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 | 280,270,939 | |
| -1 | -280,270,939 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 280,270,939.
Example:
1 x 280,270,939 = 280,270,939
and
-1 x -280,270,939 = 280,270,939
Notice both answers equal 280,270,939
With that explanation out of the way, let's continue. Next, we take the number 280,270,939 and divide it by 2:
280,270,939 ÷ 2 = 140,135,469.5
If the quotient is a whole number, then 2 and 140,135,469.5 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 | 280,270,939 | |
| -1 | -280,270,939 |
Now, we try dividing 280,270,939 by 3:
280,270,939 ÷ 3 = 93,423,646.3333
If the quotient is a whole number, then 3 and 93,423,646.3333 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 | 280,270,939 | |
| -1 | -280,270,939 |
Let's try dividing by 4:
280,270,939 ÷ 4 = 70,067,734.75
If the quotient is a whole number, then 4 and 70,067,734.75 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 | 280,270,939 | |
| -1 | 280,270,939 |
If you did it right, you will end up with this table:
| 1 | 13 | 23 | 299 | 929 | 1,009 | 12,077 | 13,117 | 21,367 | 23,207 | 277,771 | 301,691 | 937,361 | 12,185,693 | 21,559,303 | 280,270,939 |
| -1 | -13 | -23 | -299 | -929 | -1,009 | -12,077 | -13,117 | -21,367 | -23,207 | -277,771 | -301,691 | -937,361 | -12,185,693 | -21,559,303 | -280,270,939 |
Here are some more numbers to try:
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