A:
Positive:
1 x 283202455 x 566404923 x 123131589 x 318205115 x 246263445 x 636412047 x 138352767 x 10235
Negative:
-1 x -28320245-5 x -5664049-23 x -1231315-89 x -318205-115 x -246263-445 x -63641-2047 x -13835-2767 x -10235
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 28,320,245, 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 | 28,320,245 | |
| -1 | -28,320,245 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 28,320,245.
Example:
1 x 28,320,245 = 28,320,245
and
-1 x -28,320,245 = 28,320,245
Notice both answers equal 28,320,245
With that explanation out of the way, let's continue. Next, we take the number 28,320,245 and divide it by 2:
28,320,245 ÷ 2 = 14,160,122.5
If the quotient is a whole number, then 2 and 14,160,122.5 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 | 28,320,245 | |
| -1 | -28,320,245 |
Now, we try dividing 28,320,245 by 3:
28,320,245 ÷ 3 = 9,440,081.6667
If the quotient is a whole number, then 3 and 9,440,081.6667 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 | 28,320,245 | |
| -1 | -28,320,245 |
Let's try dividing by 4:
28,320,245 ÷ 4 = 7,080,061.25
If the quotient is a whole number, then 4 and 7,080,061.25 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 | 28,320,245 | |
| -1 | 28,320,245 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 89 | 115 | 445 | 2,047 | 2,767 | 10,235 | 13,835 | 63,641 | 246,263 | 318,205 | 1,231,315 | 5,664,049 | 28,320,245 |
| -1 | -5 | -23 | -89 | -115 | -445 | -2,047 | -2,767 | -10,235 | -13,835 | -63,641 | -246,263 | -318,205 | -1,231,315 | -5,664,049 | -28,320,245 |
Here are some more numbers to try:
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