A:
Positive:
1 x 7278305155 x 14556610323 x 3164480537 x 19671095115 x 6328961185 x 3934219851 x 8552654255 x 171053
Negative:
-1 x -727830515-5 x -145566103-23 x -31644805-37 x -19671095-115 x -6328961-185 x -3934219-851 x -855265-4255 x -171053
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 727,830,515, 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 | 727,830,515 | |
| -1 | -727,830,515 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 727,830,515.
Example:
1 x 727,830,515 = 727,830,515
and
-1 x -727,830,515 = 727,830,515
Notice both answers equal 727,830,515
With that explanation out of the way, let's continue. Next, we take the number 727,830,515 and divide it by 2:
727,830,515 ÷ 2 = 363,915,257.5
If the quotient is a whole number, then 2 and 363,915,257.5 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 | 727,830,515 | |
| -1 | -727,830,515 |
Now, we try dividing 727,830,515 by 3:
727,830,515 ÷ 3 = 242,610,171.6667
If the quotient is a whole number, then 3 and 242,610,171.6667 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 | 727,830,515 | |
| -1 | -727,830,515 |
Let's try dividing by 4:
727,830,515 ÷ 4 = 181,957,628.75
If the quotient is a whole number, then 4 and 181,957,628.75 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 | 727,830,515 | |
| -1 | 727,830,515 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 37 | 115 | 185 | 851 | 4,255 | 171,053 | 855,265 | 3,934,219 | 6,328,961 | 19,671,095 | 31,644,805 | 145,566,103 | 727,830,515 |
| -1 | -5 | -23 | -37 | -115 | -185 | -851 | -4,255 | -171,053 | -855,265 | -3,934,219 | -6,328,961 | -19,671,095 | -31,644,805 | -145,566,103 | -727,830,515 |
Here are some more numbers to try:
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