A:
Positive:
1 x 7618178155 x 15236356311 x 6925616555 x 13851233121 x 6296015605 x 12592031331 x 5723656655 x 114473
Negative:
-1 x -761817815-5 x -152363563-11 x -69256165-55 x -13851233-121 x -6296015-605 x -1259203-1331 x -572365-6655 x -114473
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 761,817,815, 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 | 761,817,815 | |
| -1 | -761,817,815 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 761,817,815.
Example:
1 x 761,817,815 = 761,817,815
and
-1 x -761,817,815 = 761,817,815
Notice both answers equal 761,817,815
With that explanation out of the way, let's continue. Next, we take the number 761,817,815 and divide it by 2:
761,817,815 ÷ 2 = 380,908,907.5
If the quotient is a whole number, then 2 and 380,908,907.5 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 | 761,817,815 | |
| -1 | -761,817,815 |
Now, we try dividing 761,817,815 by 3:
761,817,815 ÷ 3 = 253,939,271.6667
If the quotient is a whole number, then 3 and 253,939,271.6667 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 | 761,817,815 | |
| -1 | -761,817,815 |
Let's try dividing by 4:
761,817,815 ÷ 4 = 190,454,453.75
If the quotient is a whole number, then 4 and 190,454,453.75 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 | 761,817,815 | |
| -1 | 761,817,815 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 121 | 605 | 1,331 | 6,655 | 114,473 | 572,365 | 1,259,203 | 6,296,015 | 13,851,233 | 69,256,165 | 152,363,563 | 761,817,815 |
| -1 | -5 | -11 | -55 | -121 | -605 | -1,331 | -6,655 | -114,473 | -572,365 | -1,259,203 | -6,296,015 | -13,851,233 | -69,256,165 | -152,363,563 | -761,817,815 |
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