A:
Positive:
1 x 6454475455 x 129089509199 x 3243455307 x 2102435995 x 6486911535 x 4204872113 x 30546510565 x 61093
Negative:
-1 x -645447545-5 x -129089509-199 x -3243455-307 x -2102435-995 x -648691-1535 x -420487-2113 x -305465-10565 x -61093
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 645,447,545, 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 | 645,447,545 | |
| -1 | -645,447,545 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 645,447,545.
Example:
1 x 645,447,545 = 645,447,545
and
-1 x -645,447,545 = 645,447,545
Notice both answers equal 645,447,545
With that explanation out of the way, let's continue. Next, we take the number 645,447,545 and divide it by 2:
645,447,545 ÷ 2 = 322,723,772.5
If the quotient is a whole number, then 2 and 322,723,772.5 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 | 645,447,545 | |
| -1 | -645,447,545 |
Now, we try dividing 645,447,545 by 3:
645,447,545 ÷ 3 = 215,149,181.6667
If the quotient is a whole number, then 3 and 215,149,181.6667 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 | 645,447,545 | |
| -1 | -645,447,545 |
Let's try dividing by 4:
645,447,545 ÷ 4 = 161,361,886.25
If the quotient is a whole number, then 4 and 161,361,886.25 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 | 645,447,545 | |
| -1 | 645,447,545 |
If you did it right, you will end up with this table:
| 1 | 5 | 199 | 307 | 995 | 1,535 | 2,113 | 10,565 | 61,093 | 305,465 | 420,487 | 648,691 | 2,102,435 | 3,243,455 | 129,089,509 | 645,447,545 |
| -1 | -5 | -199 | -307 | -995 | -1,535 | -2,113 | -10,565 | -61,093 | -305,465 | -420,487 | -648,691 | -2,102,435 | -3,243,455 | -129,089,509 | -645,447,545 |
Here are some more numbers to try:
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