A:
Positive:
1 x 6455364555 x 12910729197 x 6655015257 x 2511815485 x 13310031285 x 5023635179 x 12464524929 x 25895
Negative:
-1 x -645536455-5 x -129107291-97 x -6655015-257 x -2511815-485 x -1331003-1285 x -502363-5179 x -124645-24929 x -25895
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 645,536,455, 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 | 645,536,455 | |
| -1 | -645,536,455 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 645,536,455.
Example:
1 x 645,536,455 = 645,536,455
and
-1 x -645,536,455 = 645,536,455
Notice both answers equal 645,536,455
With that explanation out of the way, let's continue. Next, we take the number 645,536,455 and divide it by 2:
645,536,455 ÷ 2 = 322,768,227.5
If the quotient is a whole number, then 2 and 322,768,227.5 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 | 645,536,455 | |
| -1 | -645,536,455 |
Now, we try dividing 645,536,455 by 3:
645,536,455 ÷ 3 = 215,178,818.3333
If the quotient is a whole number, then 3 and 215,178,818.3333 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 | 645,536,455 | |
| -1 | -645,536,455 |
Let's try dividing by 4:
645,536,455 ÷ 4 = 161,384,113.75
If the quotient is a whole number, then 4 and 161,384,113.75 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 | 645,536,455 | |
| -1 | 645,536,455 |
If you did it right, you will end up with this table:
| 1 | 5 | 97 | 257 | 485 | 1,285 | 5,179 | 24,929 | 25,895 | 124,645 | 502,363 | 1,331,003 | 2,511,815 | 6,655,015 | 129,107,291 | 645,536,455 |
| -1 | -5 | -97 | -257 | -485 | -1,285 | -5,179 | -24,929 | -25,895 | -124,645 | -502,363 | -1,331,003 | -2,511,815 | -6,655,015 | -129,107,291 | -645,536,455 |
Here are some more numbers to try:
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