A:
Positive:
1 x 7227803877 x 10325434119 x 38041073133 x 54344391583 x 4565893433 x 21053911081 x 6522724031 x 30077
Negative:
-1 x -722780387-7 x -103254341-19 x -38041073-133 x -5434439-1583 x -456589-3433 x -210539-11081 x -65227-24031 x -30077
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 722,780,387, 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 | 722,780,387 | |
| -1 | -722,780,387 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 722,780,387.
Example:
1 x 722,780,387 = 722,780,387
and
-1 x -722,780,387 = 722,780,387
Notice both answers equal 722,780,387
With that explanation out of the way, let's continue. Next, we take the number 722,780,387 and divide it by 2:
722,780,387 ÷ 2 = 361,390,193.5
If the quotient is a whole number, then 2 and 361,390,193.5 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 | 722,780,387 | |
| -1 | -722,780,387 |
Now, we try dividing 722,780,387 by 3:
722,780,387 ÷ 3 = 240,926,795.6667
If the quotient is a whole number, then 3 and 240,926,795.6667 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 | 722,780,387 | |
| -1 | -722,780,387 |
Let's try dividing by 4:
722,780,387 ÷ 4 = 180,695,096.75
If the quotient is a whole number, then 4 and 180,695,096.75 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 | 722,780,387 | |
| -1 | 722,780,387 |
If you did it right, you will end up with this table:
| 1 | 7 | 19 | 133 | 1,583 | 3,433 | 11,081 | 24,031 | 30,077 | 65,227 | 210,539 | 456,589 | 5,434,439 | 38,041,073 | 103,254,341 | 722,780,387 |
| -1 | -7 | -19 | -133 | -1,583 | -3,433 | -11,081 | -24,031 | -30,077 | -65,227 | -210,539 | -456,589 | -5,434,439 | -38,041,073 | -103,254,341 | -722,780,387 |
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