A:
Positive:
1 x 800205555 x 1600411147 x 1702565167 x 479165235 x 340513835 x 958332039 x 392457849 x 10195
Negative:
-1 x -80020555-5 x -16004111-47 x -1702565-167 x -479165-235 x -340513-835 x -95833-2039 x -39245-7849 x -10195
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 80,020,555, 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 | 80,020,555 | |
| -1 | -80,020,555 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 80,020,555.
Example:
1 x 80,020,555 = 80,020,555
and
-1 x -80,020,555 = 80,020,555
Notice both answers equal 80,020,555
With that explanation out of the way, let's continue. Next, we take the number 80,020,555 and divide it by 2:
80,020,555 ÷ 2 = 40,010,277.5
If the quotient is a whole number, then 2 and 40,010,277.5 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 | 80,020,555 | |
| -1 | -80,020,555 |
Now, we try dividing 80,020,555 by 3:
80,020,555 ÷ 3 = 26,673,518.3333
If the quotient is a whole number, then 3 and 26,673,518.3333 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 | 80,020,555 | |
| -1 | -80,020,555 |
Let's try dividing by 4:
80,020,555 ÷ 4 = 20,005,138.75
If the quotient is a whole number, then 4 and 20,005,138.75 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 | 80,020,555 | |
| -1 | 80,020,555 |
If you did it right, you will end up with this table:
| 1 | 5 | 47 | 167 | 235 | 835 | 2,039 | 7,849 | 10,195 | 39,245 | 95,833 | 340,513 | 479,165 | 1,702,565 | 16,004,111 | 80,020,555 |
| -1 | -5 | -47 | -167 | -235 | -835 | -2,039 | -7,849 | -10,195 | -39,245 | -95,833 | -340,513 | -479,165 | -1,702,565 | -16,004,111 | -80,020,555 |
Here are some more numbers to try:
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