A:
Positive:
1 x 20890358943 x 485822361 x 342464973 x 28616931091 x 1914792623 x 796433139 x 665514453 x 46913
Negative:
-1 x -208903589-43 x -4858223-61 x -3424649-73 x -2861693-1091 x -191479-2623 x -79643-3139 x -66551-4453 x -46913
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 208,903,589, 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 | 208,903,589 | |
| -1 | -208,903,589 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 208,903,589.
Example:
1 x 208,903,589 = 208,903,589
and
-1 x -208,903,589 = 208,903,589
Notice both answers equal 208,903,589
With that explanation out of the way, let's continue. Next, we take the number 208,903,589 and divide it by 2:
208,903,589 ÷ 2 = 104,451,794.5
If the quotient is a whole number, then 2 and 104,451,794.5 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 | 208,903,589 | |
| -1 | -208,903,589 |
Now, we try dividing 208,903,589 by 3:
208,903,589 ÷ 3 = 69,634,529.6667
If the quotient is a whole number, then 3 and 69,634,529.6667 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 | 208,903,589 | |
| -1 | -208,903,589 |
Let's try dividing by 4:
208,903,589 ÷ 4 = 52,225,897.25
If the quotient is a whole number, then 4 and 52,225,897.25 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 | 208,903,589 | |
| -1 | 208,903,589 |
If you did it right, you will end up with this table:
| 1 | 43 | 61 | 73 | 1,091 | 2,623 | 3,139 | 4,453 | 46,913 | 66,551 | 79,643 | 191,479 | 2,861,693 | 3,424,649 | 4,858,223 | 208,903,589 |
| -1 | -43 | -61 | -73 | -1,091 | -2,623 | -3,139 | -4,453 | -46,913 | -66,551 | -79,643 | -191,479 | -2,861,693 | -3,424,649 | -4,858,223 | -208,903,589 |
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