A:
Positive:
1 x 64466300943 x 1499216353 x 12163453191 x 33751991481 x 4352892279 x 2828718213 x 7849310123 x 63683
Negative:
-1 x -644663009-43 x -14992163-53 x -12163453-191 x -3375199-1481 x -435289-2279 x -282871-8213 x -78493-10123 x -63683
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 644,663,009, 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 | 644,663,009 | |
| -1 | -644,663,009 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 644,663,009.
Example:
1 x 644,663,009 = 644,663,009
and
-1 x -644,663,009 = 644,663,009
Notice both answers equal 644,663,009
With that explanation out of the way, let's continue. Next, we take the number 644,663,009 and divide it by 2:
644,663,009 ÷ 2 = 322,331,504.5
If the quotient is a whole number, then 2 and 322,331,504.5 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 | 644,663,009 | |
| -1 | -644,663,009 |
Now, we try dividing 644,663,009 by 3:
644,663,009 ÷ 3 = 214,887,669.6667
If the quotient is a whole number, then 3 and 214,887,669.6667 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 | 644,663,009 | |
| -1 | -644,663,009 |
Let's try dividing by 4:
644,663,009 ÷ 4 = 161,165,752.25
If the quotient is a whole number, then 4 and 161,165,752.25 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 | 644,663,009 | |
| -1 | 644,663,009 |
If you did it right, you will end up with this table:
| 1 | 43 | 53 | 191 | 1,481 | 2,279 | 8,213 | 10,123 | 63,683 | 78,493 | 282,871 | 435,289 | 3,375,199 | 12,163,453 | 14,992,163 | 644,663,009 |
| -1 | -43 | -53 | -191 | -1,481 | -2,279 | -8,213 | -10,123 | -63,683 | -78,493 | -282,871 | -435,289 | -3,375,199 | -12,163,453 | -14,992,163 | -644,663,009 |
Here are some more numbers to try:
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