A:
Positive:
1 x 20340881319 x 1070572729 x 701409759 x 3447607551 x 3691631121 x 1814531711 x 1188836257 x 32509
Negative:
-1 x -203408813-19 x -10705727-29 x -7014097-59 x -3447607-551 x -369163-1121 x -181453-1711 x -118883-6257 x -32509
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 203,408,813, 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 | 203,408,813 | |
| -1 | -203,408,813 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 203,408,813.
Example:
1 x 203,408,813 = 203,408,813
and
-1 x -203,408,813 = 203,408,813
Notice both answers equal 203,408,813
With that explanation out of the way, let's continue. Next, we take the number 203,408,813 and divide it by 2:
203,408,813 ÷ 2 = 101,704,406.5
If the quotient is a whole number, then 2 and 101,704,406.5 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 | 203,408,813 | |
| -1 | -203,408,813 |
Now, we try dividing 203,408,813 by 3:
203,408,813 ÷ 3 = 67,802,937.6667
If the quotient is a whole number, then 3 and 67,802,937.6667 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 | 203,408,813 | |
| -1 | -203,408,813 |
Let's try dividing by 4:
203,408,813 ÷ 4 = 50,852,203.25
If the quotient is a whole number, then 4 and 50,852,203.25 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 | 203,408,813 | |
| -1 | 203,408,813 |
If you did it right, you will end up with this table:
| 1 | 19 | 29 | 59 | 551 | 1,121 | 1,711 | 6,257 | 32,509 | 118,883 | 181,453 | 369,163 | 3,447,607 | 7,014,097 | 10,705,727 | 203,408,813 |
| -1 | -19 | -29 | -59 | -551 | -1,121 | -1,711 | -6,257 | -32,509 | -118,883 | -181,453 | -369,163 | -3,447,607 | -7,014,097 | -10,705,727 | -203,408,813 |
Here are some more numbers to try:
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