A:
Positive:
1 x 804117055 x 1608234111 x 731015519 x 423219555 x 146203195 x 846439209 x 3847451045 x 76949
Negative:
-1 x -80411705-5 x -16082341-11 x -7310155-19 x -4232195-55 x -1462031-95 x -846439-209 x -384745-1045 x -76949
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 80,411,705, 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 | 80,411,705 | |
| -1 | -80,411,705 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 80,411,705.
Example:
1 x 80,411,705 = 80,411,705
and
-1 x -80,411,705 = 80,411,705
Notice both answers equal 80,411,705
With that explanation out of the way, let's continue. Next, we take the number 80,411,705 and divide it by 2:
80,411,705 ÷ 2 = 40,205,852.5
If the quotient is a whole number, then 2 and 40,205,852.5 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 | 80,411,705 | |
| -1 | -80,411,705 |
Now, we try dividing 80,411,705 by 3:
80,411,705 ÷ 3 = 26,803,901.6667
If the quotient is a whole number, then 3 and 26,803,901.6667 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 | 80,411,705 | |
| -1 | -80,411,705 |
Let's try dividing by 4:
80,411,705 ÷ 4 = 20,102,926.25
If the quotient is a whole number, then 4 and 20,102,926.25 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 | 80,411,705 | |
| -1 | 80,411,705 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 19 | 55 | 95 | 209 | 1,045 | 76,949 | 384,745 | 846,439 | 1,462,031 | 4,232,195 | 7,310,155 | 16,082,341 | 80,411,705 |
| -1 | -5 | -11 | -19 | -55 | -95 | -209 | -1,045 | -76,949 | -384,745 | -846,439 | -1,462,031 | -4,232,195 | -7,310,155 | -16,082,341 | -80,411,705 |
Here are some more numbers to try:
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