A:
Positive:
1 x 1715555055 x 3431110111 x 1559595523 x 745893555 x 3119191115 x 1491787253 x 6780851265 x 135617
Negative:
-1 x -171555505-5 x -34311101-11 x -15595955-23 x -7458935-55 x -3119191-115 x -1491787-253 x -678085-1265 x -135617
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 171,555,505, 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 | 171,555,505 | |
| -1 | -171,555,505 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 171,555,505.
Example:
1 x 171,555,505 = 171,555,505
and
-1 x -171,555,505 = 171,555,505
Notice both answers equal 171,555,505
With that explanation out of the way, let's continue. Next, we take the number 171,555,505 and divide it by 2:
171,555,505 ÷ 2 = 85,777,752.5
If the quotient is a whole number, then 2 and 85,777,752.5 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 | 171,555,505 | |
| -1 | -171,555,505 |
Now, we try dividing 171,555,505 by 3:
171,555,505 ÷ 3 = 57,185,168.3333
If the quotient is a whole number, then 3 and 57,185,168.3333 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 | 171,555,505 | |
| -1 | -171,555,505 |
Let's try dividing by 4:
171,555,505 ÷ 4 = 42,888,876.25
If the quotient is a whole number, then 4 and 42,888,876.25 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 | 171,555,505 | |
| -1 | 171,555,505 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 23 | 55 | 115 | 253 | 1,265 | 135,617 | 678,085 | 1,491,787 | 3,119,191 | 7,458,935 | 15,595,955 | 34,311,101 | 171,555,505 |
| -1 | -5 | -11 | -23 | -55 | -115 | -253 | -1,265 | -135,617 | -678,085 | -1,491,787 | -3,119,191 | -7,458,935 | -15,595,955 | -34,311,101 | -171,555,505 |
Here are some more numbers to try:
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