A:
Positive:
1 x 2087380242 x 1043690124 x 521845068 x 2609225311 x 1897618422 x 948809244 x 474404688 x 2372023
Negative:
-1 x -208738024-2 x -104369012-4 x -52184506-8 x -26092253-11 x -18976184-22 x -9488092-44 x -4744046-88 x -2372023
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 208,738,024, 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 | 208,738,024 | |
| -1 | -208,738,024 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 208,738,024.
Example:
1 x 208,738,024 = 208,738,024
and
-1 x -208,738,024 = 208,738,024
Notice both answers equal 208,738,024
With that explanation out of the way, let's continue. Next, we take the number 208,738,024 and divide it by 2:
208,738,024 ÷ 2 = 104,369,012
If the quotient is a whole number, then 2 and 104,369,012 are factors. In this case, the quotient is a whole number. Write them in the table inside the other two factors like the below example. Don't forget to write the negative numbers too!
Here is what our table should look like at this step:
| 1 | 2 | 104,369,012 | 208,738,024 | |
| -1 | -2 | -104,369,012 | -208,738,024 |
Now, we try dividing 208,738,024 by 3:
208,738,024 ÷ 3 = 69,579,341.3333
If the quotient is a whole number, then 3 and 69,579,341.3333 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 | 2 | 104,369,012 | 208,738,024 | |
| -1 | -2 | -104,369,012 | -208,738,024 |
Let's try dividing by 4:
208,738,024 ÷ 4 = 52,184,506
If the quotient is a whole number, then 4 and 52,184,506 are factors. In this case, the quotient is a whole number. Write them in the table inside the other two factors like the below example. Don't forget to write the negative numbers too!
Here is what our table should look like at this step:
| 1 | 2 | 4 | 52,184,506 | 104,369,012 | 208,738,024 | |
| -1 | -2 | -4 | -52,184,506 | -104,369,012 | 208,738,024 |
If you did it right, you will end up with this table:
| 1 | 2 | 4 | 8 | 11 | 22 | 44 | 88 | 2,372,023 | 4,744,046 | 9,488,092 | 18,976,184 | 26,092,253 | 52,184,506 | 104,369,012 | 208,738,024 |
| -1 | -2 | -4 | -8 | -11 | -22 | -44 | -88 | -2,372,023 | -4,744,046 | -9,488,092 | -18,976,184 | -26,092,253 | -52,184,506 | -104,369,012 | -208,738,024 |
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