A:
Positive:
1 x 76178008737 x 2058865171 x 10729297409 x 1862543709 x 10744432627 x 28998115133 x 5033926233 x 29039
Negative:
-1 x -761780087-37 x -20588651-71 x -10729297-409 x -1862543-709 x -1074443-2627 x -289981-15133 x -50339-26233 x -29039
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 761,780,087, 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 | 761,780,087 | |
| -1 | -761,780,087 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 761,780,087.
Example:
1 x 761,780,087 = 761,780,087
and
-1 x -761,780,087 = 761,780,087
Notice both answers equal 761,780,087
With that explanation out of the way, let's continue. Next, we take the number 761,780,087 and divide it by 2:
761,780,087 ÷ 2 = 380,890,043.5
If the quotient is a whole number, then 2 and 380,890,043.5 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 | 761,780,087 | |
| -1 | -761,780,087 |
Now, we try dividing 761,780,087 by 3:
761,780,087 ÷ 3 = 253,926,695.6667
If the quotient is a whole number, then 3 and 253,926,695.6667 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 | 761,780,087 | |
| -1 | -761,780,087 |
Let's try dividing by 4:
761,780,087 ÷ 4 = 190,445,021.75
If the quotient is a whole number, then 4 and 190,445,021.75 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 | 761,780,087 | |
| -1 | 761,780,087 |
If you did it right, you will end up with this table:
| 1 | 37 | 71 | 409 | 709 | 2,627 | 15,133 | 26,233 | 29,039 | 50,339 | 289,981 | 1,074,443 | 1,862,543 | 10,729,297 | 20,588,651 | 761,780,087 |
| -1 | -37 | -71 | -409 | -709 | -2,627 | -15,133 | -26,233 | -29,039 | -50,339 | -289,981 | -1,074,443 | -1,862,543 | -10,729,297 | -20,588,651 | -761,780,087 |
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