A:
Positive:
1 x 666718555 x 1333437119 x 350904531 x 215070595 x 701809155 x 430141589 x 1131952945 x 22639
Negative:
-1 x -66671855-5 x -13334371-19 x -3509045-31 x -2150705-95 x -701809-155 x -430141-589 x -113195-2945 x -22639
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 66,671,855, 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 | 66,671,855 | |
| -1 | -66,671,855 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 66,671,855.
Example:
1 x 66,671,855 = 66,671,855
and
-1 x -66,671,855 = 66,671,855
Notice both answers equal 66,671,855
With that explanation out of the way, let's continue. Next, we take the number 66,671,855 and divide it by 2:
66,671,855 ÷ 2 = 33,335,927.5
If the quotient is a whole number, then 2 and 33,335,927.5 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 | 66,671,855 | |
| -1 | -66,671,855 |
Now, we try dividing 66,671,855 by 3:
66,671,855 ÷ 3 = 22,223,951.6667
If the quotient is a whole number, then 3 and 22,223,951.6667 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 | 66,671,855 | |
| -1 | -66,671,855 |
Let's try dividing by 4:
66,671,855 ÷ 4 = 16,667,963.75
If the quotient is a whole number, then 4 and 16,667,963.75 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 | 66,671,855 | |
| -1 | 66,671,855 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 31 | 95 | 155 | 589 | 2,945 | 22,639 | 113,195 | 430,141 | 701,809 | 2,150,705 | 3,509,045 | 13,334,371 | 66,671,855 |
| -1 | -5 | -19 | -31 | -95 | -155 | -589 | -2,945 | -22,639 | -113,195 | -430,141 | -701,809 | -2,150,705 | -3,509,045 | -13,334,371 | -66,671,855 |
Here are some more numbers to try:
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