A:
Positive:
1 x 64362224311 x 5851111379 x 8147117401 x 1605043869 x 7406471847 x 3484694411 x 14591320317 x 31679
Negative:
-1 x -643622243-11 x -58511113-79 x -8147117-401 x -1605043-869 x -740647-1847 x -348469-4411 x -145913-20317 x -31679
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 643,622,243, 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 | 643,622,243 | |
| -1 | -643,622,243 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 643,622,243.
Example:
1 x 643,622,243 = 643,622,243
and
-1 x -643,622,243 = 643,622,243
Notice both answers equal 643,622,243
With that explanation out of the way, let's continue. Next, we take the number 643,622,243 and divide it by 2:
643,622,243 ÷ 2 = 321,811,121.5
If the quotient is a whole number, then 2 and 321,811,121.5 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 | 643,622,243 | |
| -1 | -643,622,243 |
Now, we try dividing 643,622,243 by 3:
643,622,243 ÷ 3 = 214,540,747.6667
If the quotient is a whole number, then 3 and 214,540,747.6667 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 | 643,622,243 | |
| -1 | -643,622,243 |
Let's try dividing by 4:
643,622,243 ÷ 4 = 160,905,560.75
If the quotient is a whole number, then 4 and 160,905,560.75 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 | 643,622,243 | |
| -1 | 643,622,243 |
If you did it right, you will end up with this table:
| 1 | 11 | 79 | 401 | 869 | 1,847 | 4,411 | 20,317 | 31,679 | 145,913 | 348,469 | 740,647 | 1,605,043 | 8,147,117 | 58,511,113 | 643,622,243 |
| -1 | -11 | -79 | -401 | -869 | -1,847 | -4,411 | -20,317 | -31,679 | -145,913 | -348,469 | -740,647 | -1,605,043 | -8,147,117 | -58,511,113 | -643,622,243 |
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