A:
Positive:
1 x 64412553711 x 58556867173 x 3723269271 x 23768471249 x 5157131903 x 3384792981 x 21607713739 x 46883
Negative:
-1 x -644125537-11 x -58556867-173 x -3723269-271 x -2376847-1249 x -515713-1903 x -338479-2981 x -216077-13739 x -46883
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 644,125,537, 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 | 644,125,537 | |
| -1 | -644,125,537 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 644,125,537.
Example:
1 x 644,125,537 = 644,125,537
and
-1 x -644,125,537 = 644,125,537
Notice both answers equal 644,125,537
With that explanation out of the way, let's continue. Next, we take the number 644,125,537 and divide it by 2:
644,125,537 ÷ 2 = 322,062,768.5
If the quotient is a whole number, then 2 and 322,062,768.5 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 | 644,125,537 | |
| -1 | -644,125,537 |
Now, we try dividing 644,125,537 by 3:
644,125,537 ÷ 3 = 214,708,512.3333
If the quotient is a whole number, then 3 and 214,708,512.3333 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 | 644,125,537 | |
| -1 | -644,125,537 |
Let's try dividing by 4:
644,125,537 ÷ 4 = 161,031,384.25
If the quotient is a whole number, then 4 and 161,031,384.25 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 | 644,125,537 | |
| -1 | 644,125,537 |
If you did it right, you will end up with this table:
| 1 | 11 | 173 | 271 | 1,249 | 1,903 | 2,981 | 13,739 | 46,883 | 216,077 | 338,479 | 515,713 | 2,376,847 | 3,723,269 | 58,556,867 | 644,125,537 |
| -1 | -11 | -173 | -271 | -1,249 | -1,903 | -2,981 | -13,739 | -46,883 | -216,077 | -338,479 | -515,713 | -2,376,847 | -3,723,269 | -58,556,867 | -644,125,537 |
Here are some more numbers to try:
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