A:
Positive:
1 x 62564442117 x 36802613139 x 4501039271 x 2308651977 x 6403732363 x 2647674607 x 13580316609 x 37669
Negative:
-1 x -625644421-17 x -36802613-139 x -4501039-271 x -2308651-977 x -640373-2363 x -264767-4607 x -135803-16609 x -37669
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 625,644,421, 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 | 625,644,421 | |
| -1 | -625,644,421 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 625,644,421.
Example:
1 x 625,644,421 = 625,644,421
and
-1 x -625,644,421 = 625,644,421
Notice both answers equal 625,644,421
With that explanation out of the way, let's continue. Next, we take the number 625,644,421 and divide it by 2:
625,644,421 ÷ 2 = 312,822,210.5
If the quotient is a whole number, then 2 and 312,822,210.5 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 | 625,644,421 | |
| -1 | -625,644,421 |
Now, we try dividing 625,644,421 by 3:
625,644,421 ÷ 3 = 208,548,140.3333
If the quotient is a whole number, then 3 and 208,548,140.3333 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 | 625,644,421 | |
| -1 | -625,644,421 |
Let's try dividing by 4:
625,644,421 ÷ 4 = 156,411,105.25
If the quotient is a whole number, then 4 and 156,411,105.25 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 | 625,644,421 | |
| -1 | 625,644,421 |
If you did it right, you will end up with this table:
| 1 | 17 | 139 | 271 | 977 | 2,363 | 4,607 | 16,609 | 37,669 | 135,803 | 264,767 | 640,373 | 2,308,651 | 4,501,039 | 36,802,613 | 625,644,421 |
| -1 | -17 | -139 | -271 | -977 | -2,363 | -4,607 | -16,609 | -37,669 | -135,803 | -264,767 | -640,373 | -2,308,651 | -4,501,039 | -36,802,613 | -625,644,421 |
Here are some more numbers to try:
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