A:
Positive:
1 x 1783540855 x 356708177 x 2547915513 x 1371954535 x 509583165 x 274390991 x 1959935455 x 391987
Negative:
-1 x -178354085-5 x -35670817-7 x -25479155-13 x -13719545-35 x -5095831-65 x -2743909-91 x -1959935-455 x -391987
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 178,354,085, 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 | 178,354,085 | |
| -1 | -178,354,085 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 178,354,085.
Example:
1 x 178,354,085 = 178,354,085
and
-1 x -178,354,085 = 178,354,085
Notice both answers equal 178,354,085
With that explanation out of the way, let's continue. Next, we take the number 178,354,085 and divide it by 2:
178,354,085 ÷ 2 = 89,177,042.5
If the quotient is a whole number, then 2 and 89,177,042.5 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 | 178,354,085 | |
| -1 | -178,354,085 |
Now, we try dividing 178,354,085 by 3:
178,354,085 ÷ 3 = 59,451,361.6667
If the quotient is a whole number, then 3 and 59,451,361.6667 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 | 178,354,085 | |
| -1 | -178,354,085 |
Let's try dividing by 4:
178,354,085 ÷ 4 = 44,588,521.25
If the quotient is a whole number, then 4 and 44,588,521.25 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 | 178,354,085 | |
| -1 | 178,354,085 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 13 | 35 | 65 | 91 | 455 | 391,987 | 1,959,935 | 2,743,909 | 5,095,831 | 13,719,545 | 25,479,155 | 35,670,817 | 178,354,085 |
| -1 | -5 | -7 | -13 | -35 | -65 | -91 | -455 | -391,987 | -1,959,935 | -2,743,909 | -5,095,831 | -13,719,545 | -25,479,155 | -35,670,817 | -178,354,085 |
Here are some more numbers to try:
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