A:
Positive:
1 x 1661611555 x 3323223129 x 5729695145 x 1145939151 x 1100405755 x 2200814379 x 379457589 x 21895
Negative:
-1 x -166161155-5 x -33232231-29 x -5729695-145 x -1145939-151 x -1100405-755 x -220081-4379 x -37945-7589 x -21895
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 166,161,155, 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 | 166,161,155 | |
| -1 | -166,161,155 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 166,161,155.
Example:
1 x 166,161,155 = 166,161,155
and
-1 x -166,161,155 = 166,161,155
Notice both answers equal 166,161,155
With that explanation out of the way, let's continue. Next, we take the number 166,161,155 and divide it by 2:
166,161,155 ÷ 2 = 83,080,577.5
If the quotient is a whole number, then 2 and 83,080,577.5 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 | 166,161,155 | |
| -1 | -166,161,155 |
Now, we try dividing 166,161,155 by 3:
166,161,155 ÷ 3 = 55,387,051.6667
If the quotient is a whole number, then 3 and 55,387,051.6667 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 | 166,161,155 | |
| -1 | -166,161,155 |
Let's try dividing by 4:
166,161,155 ÷ 4 = 41,540,288.75
If the quotient is a whole number, then 4 and 41,540,288.75 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 | 166,161,155 | |
| -1 | 166,161,155 |
If you did it right, you will end up with this table:
| 1 | 5 | 29 | 145 | 151 | 755 | 4,379 | 7,589 | 21,895 | 37,945 | 220,081 | 1,100,405 | 1,145,939 | 5,729,695 | 33,232,231 | 166,161,155 |
| -1 | -5 | -29 | -145 | -151 | -755 | -4,379 | -7,589 | -21,895 | -37,945 | -220,081 | -1,100,405 | -1,145,939 | -5,729,695 | -33,232,231 | -166,161,155 |
Here are some more numbers to try:
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