A:
Positive:
1 x 809703955 x 1619407911 x 736094555 x 1472189157 x 515735785 x 1031471727 x 468858635 x 9377
Negative:
-1 x -80970395-5 x -16194079-11 x -7360945-55 x -1472189-157 x -515735-785 x -103147-1727 x -46885-8635 x -9377
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 80,970,395, 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 | 80,970,395 | |
| -1 | -80,970,395 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 80,970,395.
Example:
1 x 80,970,395 = 80,970,395
and
-1 x -80,970,395 = 80,970,395
Notice both answers equal 80,970,395
With that explanation out of the way, let's continue. Next, we take the number 80,970,395 and divide it by 2:
80,970,395 ÷ 2 = 40,485,197.5
If the quotient is a whole number, then 2 and 40,485,197.5 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 | 80,970,395 | |
| -1 | -80,970,395 |
Now, we try dividing 80,970,395 by 3:
80,970,395 ÷ 3 = 26,990,131.6667
If the quotient is a whole number, then 3 and 26,990,131.6667 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 | 80,970,395 | |
| -1 | -80,970,395 |
Let's try dividing by 4:
80,970,395 ÷ 4 = 20,242,598.75
If the quotient is a whole number, then 4 and 20,242,598.75 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 | 80,970,395 | |
| -1 | 80,970,395 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 157 | 785 | 1,727 | 8,635 | 9,377 | 46,885 | 103,147 | 515,735 | 1,472,189 | 7,360,945 | 16,194,079 | 80,970,395 |
| -1 | -5 | -11 | -55 | -157 | -785 | -1,727 | -8,635 | -9,377 | -46,885 | -103,147 | -515,735 | -1,472,189 | -7,360,945 | -16,194,079 | -80,970,395 |
Here are some more numbers to try:
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