A:
Positive:
1 x 7207237317 x 10296053313 x 5544028743 x 1676101791 x 7920041301 x 2394431559 x 12893093913 x 184187
Negative:
-1 x -720723731-7 x -102960533-13 x -55440287-43 x -16761017-91 x -7920041-301 x -2394431-559 x -1289309-3913 x -184187
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 720,723,731, 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 | 720,723,731 | |
| -1 | -720,723,731 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 720,723,731.
Example:
1 x 720,723,731 = 720,723,731
and
-1 x -720,723,731 = 720,723,731
Notice both answers equal 720,723,731
With that explanation out of the way, let's continue. Next, we take the number 720,723,731 and divide it by 2:
720,723,731 ÷ 2 = 360,361,865.5
If the quotient is a whole number, then 2 and 360,361,865.5 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 | 720,723,731 | |
| -1 | -720,723,731 |
Now, we try dividing 720,723,731 by 3:
720,723,731 ÷ 3 = 240,241,243.6667
If the quotient is a whole number, then 3 and 240,241,243.6667 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 | 720,723,731 | |
| -1 | -720,723,731 |
Let's try dividing by 4:
720,723,731 ÷ 4 = 180,180,932.75
If the quotient is a whole number, then 4 and 180,180,932.75 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 | 720,723,731 | |
| -1 | 720,723,731 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 43 | 91 | 301 | 559 | 3,913 | 184,187 | 1,289,309 | 2,394,431 | 7,920,041 | 16,761,017 | 55,440,287 | 102,960,533 | 720,723,731 |
| -1 | -7 | -13 | -43 | -91 | -301 | -559 | -3,913 | -184,187 | -1,289,309 | -2,394,431 | -7,920,041 | -16,761,017 | -55,440,287 | -102,960,533 | -720,723,731 |
Here are some more numbers to try:
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