A:
Positive:
1 x 6440325017 x 92004643229 x 2812369383 x 16815471049 x 6139491603 x 4017672681 x 2402217343 x 87707
Negative:
-1 x -644032501-7 x -92004643-229 x -2812369-383 x -1681547-1049 x -613949-1603 x -401767-2681 x -240221-7343 x -87707
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 644,032,501, 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 | 644,032,501 | |
| -1 | -644,032,501 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 644,032,501.
Example:
1 x 644,032,501 = 644,032,501
and
-1 x -644,032,501 = 644,032,501
Notice both answers equal 644,032,501
With that explanation out of the way, let's continue. Next, we take the number 644,032,501 and divide it by 2:
644,032,501 ÷ 2 = 322,016,250.5
If the quotient is a whole number, then 2 and 322,016,250.5 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 | 644,032,501 | |
| -1 | -644,032,501 |
Now, we try dividing 644,032,501 by 3:
644,032,501 ÷ 3 = 214,677,500.3333
If the quotient is a whole number, then 3 and 214,677,500.3333 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 | 644,032,501 | |
| -1 | -644,032,501 |
Let's try dividing by 4:
644,032,501 ÷ 4 = 161,008,125.25
If the quotient is a whole number, then 4 and 161,008,125.25 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 | 644,032,501 | |
| -1 | 644,032,501 |
If you did it right, you will end up with this table:
| 1 | 7 | 229 | 383 | 1,049 | 1,603 | 2,681 | 7,343 | 87,707 | 240,221 | 401,767 | 613,949 | 1,681,547 | 2,812,369 | 92,004,643 | 644,032,501 |
| -1 | -7 | -229 | -383 | -1,049 | -1,603 | -2,681 | -7,343 | -87,707 | -240,221 | -401,767 | -613,949 | -1,681,547 | -2,812,369 | -92,004,643 | -644,032,501 |
Here are some more numbers to try:
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