A:
Positive:
1 x 72005215711 x 6545928743 x 16745399473 x 15223091181 x 6096971289 x 55861312991 x 5542714179 x 50783
Negative:
-1 x -720052157-11 x -65459287-43 x -16745399-473 x -1522309-1181 x -609697-1289 x -558613-12991 x -55427-14179 x -50783
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 720,052,157, 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 | 720,052,157 | |
| -1 | -720,052,157 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 720,052,157.
Example:
1 x 720,052,157 = 720,052,157
and
-1 x -720,052,157 = 720,052,157
Notice both answers equal 720,052,157
With that explanation out of the way, let's continue. Next, we take the number 720,052,157 and divide it by 2:
720,052,157 ÷ 2 = 360,026,078.5
If the quotient is a whole number, then 2 and 360,026,078.5 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 | 720,052,157 | |
| -1 | -720,052,157 |
Now, we try dividing 720,052,157 by 3:
720,052,157 ÷ 3 = 240,017,385.6667
If the quotient is a whole number, then 3 and 240,017,385.6667 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 | 720,052,157 | |
| -1 | -720,052,157 |
Let's try dividing by 4:
720,052,157 ÷ 4 = 180,013,039.25
If the quotient is a whole number, then 4 and 180,013,039.25 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 | 720,052,157 | |
| -1 | 720,052,157 |
If you did it right, you will end up with this table:
| 1 | 11 | 43 | 473 | 1,181 | 1,289 | 12,991 | 14,179 | 50,783 | 55,427 | 558,613 | 609,697 | 1,522,309 | 16,745,399 | 65,459,287 | 720,052,157 |
| -1 | -11 | -43 | -473 | -1,181 | -1,289 | -12,991 | -14,179 | -50,783 | -55,427 | -558,613 | -609,697 | -1,522,309 | -16,745,399 | -65,459,287 | -720,052,157 |
Here are some more numbers to try:
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