A:
Positive:
1 x 800405655 x 1600811311 x 727641555 x 1455283149 x 537185745 x 1074371639 x 488358195 x 9767
Negative:
-1 x -80040565-5 x -16008113-11 x -7276415-55 x -1455283-149 x -537185-745 x -107437-1639 x -48835-8195 x -9767
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 80,040,565, 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 | 80,040,565 | |
| -1 | -80,040,565 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 80,040,565.
Example:
1 x 80,040,565 = 80,040,565
and
-1 x -80,040,565 = 80,040,565
Notice both answers equal 80,040,565
With that explanation out of the way, let's continue. Next, we take the number 80,040,565 and divide it by 2:
80,040,565 ÷ 2 = 40,020,282.5
If the quotient is a whole number, then 2 and 40,020,282.5 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 | 80,040,565 | |
| -1 | -80,040,565 |
Now, we try dividing 80,040,565 by 3:
80,040,565 ÷ 3 = 26,680,188.3333
If the quotient is a whole number, then 3 and 26,680,188.3333 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 | 80,040,565 | |
| -1 | -80,040,565 |
Let's try dividing by 4:
80,040,565 ÷ 4 = 20,010,141.25
If the quotient is a whole number, then 4 and 20,010,141.25 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 | 80,040,565 | |
| -1 | 80,040,565 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 149 | 745 | 1,639 | 8,195 | 9,767 | 48,835 | 107,437 | 537,185 | 1,455,283 | 7,276,415 | 16,008,113 | 80,040,565 |
| -1 | -5 | -11 | -55 | -149 | -745 | -1,639 | -8,195 | -9,767 | -48,835 | -107,437 | -537,185 | -1,455,283 | -7,276,415 | -16,008,113 | -80,040,565 |
Here are some more numbers to try:
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