A:
Positive:
1 x 66472725117 x 3910160347 x 1414313379 x 8414269799 x 8319491343 x 4949573713 x 17902710531 x 63121
Negative:
-1 x -664727251-17 x -39101603-47 x -14143133-79 x -8414269-799 x -831949-1343 x -494957-3713 x -179027-10531 x -63121
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 664,727,251, 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 | 664,727,251 | |
| -1 | -664,727,251 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 664,727,251.
Example:
1 x 664,727,251 = 664,727,251
and
-1 x -664,727,251 = 664,727,251
Notice both answers equal 664,727,251
With that explanation out of the way, let's continue. Next, we take the number 664,727,251 and divide it by 2:
664,727,251 ÷ 2 = 332,363,625.5
If the quotient is a whole number, then 2 and 332,363,625.5 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 | 664,727,251 | |
| -1 | -664,727,251 |
Now, we try dividing 664,727,251 by 3:
664,727,251 ÷ 3 = 221,575,750.3333
If the quotient is a whole number, then 3 and 221,575,750.3333 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 | 664,727,251 | |
| -1 | -664,727,251 |
Let's try dividing by 4:
664,727,251 ÷ 4 = 166,181,812.75
If the quotient is a whole number, then 4 and 166,181,812.75 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 | 664,727,251 | |
| -1 | 664,727,251 |
If you did it right, you will end up with this table:
| 1 | 17 | 47 | 79 | 799 | 1,343 | 3,713 | 10,531 | 63,121 | 179,027 | 494,957 | 831,949 | 8,414,269 | 14,143,133 | 39,101,603 | 664,727,251 |
| -1 | -17 | -47 | -79 | -799 | -1,343 | -3,713 | -10,531 | -63,121 | -179,027 | -494,957 | -831,949 | -8,414,269 | -14,143,133 | -39,101,603 | -664,727,251 |
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