A:
Positive:
1 x 1666106655 x 3332213313 x 1281620565 x 2563241127 x 1311895635 x 2623791651 x 1009158255 x 20183
Negative:
-1 x -166610665-5 x -33322133-13 x -12816205-65 x -2563241-127 x -1311895-635 x -262379-1651 x -100915-8255 x -20183
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 166,610,665, 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 | 166,610,665 | |
| -1 | -166,610,665 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 166,610,665.
Example:
1 x 166,610,665 = 166,610,665
and
-1 x -166,610,665 = 166,610,665
Notice both answers equal 166,610,665
With that explanation out of the way, let's continue. Next, we take the number 166,610,665 and divide it by 2:
166,610,665 ÷ 2 = 83,305,332.5
If the quotient is a whole number, then 2 and 83,305,332.5 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 | 166,610,665 | |
| -1 | -166,610,665 |
Now, we try dividing 166,610,665 by 3:
166,610,665 ÷ 3 = 55,536,888.3333
If the quotient is a whole number, then 3 and 55,536,888.3333 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 | 166,610,665 | |
| -1 | -166,610,665 |
Let's try dividing by 4:
166,610,665 ÷ 4 = 41,652,666.25
If the quotient is a whole number, then 4 and 41,652,666.25 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 | 166,610,665 | |
| -1 | 166,610,665 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 127 | 635 | 1,651 | 8,255 | 20,183 | 100,915 | 262,379 | 1,311,895 | 2,563,241 | 12,816,205 | 33,322,133 | 166,610,665 |
| -1 | -5 | -13 | -65 | -127 | -635 | -1,651 | -8,255 | -20,183 | -100,915 | -262,379 | -1,311,895 | -2,563,241 | -12,816,205 | -33,322,133 | -166,610,665 |
Here are some more numbers to try:
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