A:
Positive:
1 x 1666414155 x 3332828379 x 2109385101 x 1649915395 x 421877505 x 3299834177 x 398957979 x 20885
Negative:
-1 x -166641415-5 x -33328283-79 x -2109385-101 x -1649915-395 x -421877-505 x -329983-4177 x -39895-7979 x -20885
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 166,641,415, 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 | 166,641,415 | |
| -1 | -166,641,415 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 166,641,415.
Example:
1 x 166,641,415 = 166,641,415
and
-1 x -166,641,415 = 166,641,415
Notice both answers equal 166,641,415
With that explanation out of the way, let's continue. Next, we take the number 166,641,415 and divide it by 2:
166,641,415 ÷ 2 = 83,320,707.5
If the quotient is a whole number, then 2 and 83,320,707.5 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 | 166,641,415 | |
| -1 | -166,641,415 |
Now, we try dividing 166,641,415 by 3:
166,641,415 ÷ 3 = 55,547,138.3333
If the quotient is a whole number, then 3 and 55,547,138.3333 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 | 166,641,415 | |
| -1 | -166,641,415 |
Let's try dividing by 4:
166,641,415 ÷ 4 = 41,660,353.75
If the quotient is a whole number, then 4 and 41,660,353.75 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 | 166,641,415 | |
| -1 | 166,641,415 |
If you did it right, you will end up with this table:
| 1 | 5 | 79 | 101 | 395 | 505 | 4,177 | 7,979 | 20,885 | 39,895 | 329,983 | 421,877 | 1,649,915 | 2,109,385 | 33,328,283 | 166,641,415 |
| -1 | -5 | -79 | -101 | -395 | -505 | -4,177 | -7,979 | -20,885 | -39,895 | -329,983 | -421,877 | -1,649,915 | -2,109,385 | -33,328,283 | -166,641,415 |
Here are some more numbers to try:
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