A:
Positive:
1 x 1803914155 x 3607828319 x 949428523 x 784310595 x 1898857115 x 1568621437 x 4127952185 x 82559
Negative:
-1 x -180391415-5 x -36078283-19 x -9494285-23 x -7843105-95 x -1898857-115 x -1568621-437 x -412795-2185 x -82559
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 180,391,415, 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 | 180,391,415 | |
| -1 | -180,391,415 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 180,391,415.
Example:
1 x 180,391,415 = 180,391,415
and
-1 x -180,391,415 = 180,391,415
Notice both answers equal 180,391,415
With that explanation out of the way, let's continue. Next, we take the number 180,391,415 and divide it by 2:
180,391,415 ÷ 2 = 90,195,707.5
If the quotient is a whole number, then 2 and 90,195,707.5 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 | 180,391,415 | |
| -1 | -180,391,415 |
Now, we try dividing 180,391,415 by 3:
180,391,415 ÷ 3 = 60,130,471.6667
If the quotient is a whole number, then 3 and 60,130,471.6667 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 | 180,391,415 | |
| -1 | -180,391,415 |
Let's try dividing by 4:
180,391,415 ÷ 4 = 45,097,853.75
If the quotient is a whole number, then 4 and 45,097,853.75 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 | 180,391,415 | |
| -1 | 180,391,415 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 23 | 95 | 115 | 437 | 2,185 | 82,559 | 412,795 | 1,568,621 | 1,898,857 | 7,843,105 | 9,494,285 | 36,078,283 | 180,391,415 |
| -1 | -5 | -19 | -23 | -95 | -115 | -437 | -2,185 | -82,559 | -412,795 | -1,568,621 | -1,898,857 | -7,843,105 | -9,494,285 | -36,078,283 | -180,391,415 |
Here are some more numbers to try:
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