A:
Positive:
1 x 6441413155 x 128828263233 x 2764555719 x 895885769 x 8376351165 x 5529113595 x 1791773845 x 167527
Negative:
-1 x -644141315-5 x -128828263-233 x -2764555-719 x -895885-769 x -837635-1165 x -552911-3595 x -179177-3845 x -167527
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 644,141,315, 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 | 644,141,315 | |
| -1 | -644,141,315 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 644,141,315.
Example:
1 x 644,141,315 = 644,141,315
and
-1 x -644,141,315 = 644,141,315
Notice both answers equal 644,141,315
With that explanation out of the way, let's continue. Next, we take the number 644,141,315 and divide it by 2:
644,141,315 ÷ 2 = 322,070,657.5
If the quotient is a whole number, then 2 and 322,070,657.5 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 | 644,141,315 | |
| -1 | -644,141,315 |
Now, we try dividing 644,141,315 by 3:
644,141,315 ÷ 3 = 214,713,771.6667
If the quotient is a whole number, then 3 and 214,713,771.6667 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 | 644,141,315 | |
| -1 | -644,141,315 |
Let's try dividing by 4:
644,141,315 ÷ 4 = 161,035,328.75
If the quotient is a whole number, then 4 and 161,035,328.75 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 | 644,141,315 | |
| -1 | 644,141,315 |
If you did it right, you will end up with this table:
| 1 | 5 | 233 | 719 | 769 | 1,165 | 3,595 | 3,845 | 167,527 | 179,177 | 552,911 | 837,635 | 895,885 | 2,764,555 | 128,828,263 | 644,141,315 |
| -1 | -5 | -233 | -719 | -769 | -1,165 | -3,595 | -3,845 | -167,527 | -179,177 | -552,911 | -837,635 | -895,885 | -2,764,555 | -128,828,263 | -644,141,315 |
Here are some more numbers to try:
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