A:
Positive:
1 x 6665514713 x 512731917 x 3920891197 x 338351221 x 3016071531 x 435372561 x 260273349 x 19903
Negative:
-1 x -66655147-13 x -5127319-17 x -3920891-197 x -338351-221 x -301607-1531 x -43537-2561 x -26027-3349 x -19903
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 66,655,147, 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 | 66,655,147 | |
| -1 | -66,655,147 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 66,655,147.
Example:
1 x 66,655,147 = 66,655,147
and
-1 x -66,655,147 = 66,655,147
Notice both answers equal 66,655,147
With that explanation out of the way, let's continue. Next, we take the number 66,655,147 and divide it by 2:
66,655,147 ÷ 2 = 33,327,573.5
If the quotient is a whole number, then 2 and 33,327,573.5 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 | 66,655,147 | |
| -1 | -66,655,147 |
Now, we try dividing 66,655,147 by 3:
66,655,147 ÷ 3 = 22,218,382.3333
If the quotient is a whole number, then 3 and 22,218,382.3333 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 | 66,655,147 | |
| -1 | -66,655,147 |
Let's try dividing by 4:
66,655,147 ÷ 4 = 16,663,786.75
If the quotient is a whole number, then 4 and 16,663,786.75 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 | 66,655,147 | |
| -1 | 66,655,147 |
If you did it right, you will end up with this table:
| 1 | 13 | 17 | 197 | 221 | 1,531 | 2,561 | 3,349 | 19,903 | 26,027 | 43,537 | 301,607 | 338,351 | 3,920,891 | 5,127,319 | 66,655,147 |
| -1 | -13 | -17 | -197 | -221 | -1,531 | -2,561 | -3,349 | -19,903 | -26,027 | -43,537 | -301,607 | -338,351 | -3,920,891 | -5,127,319 | -66,655,147 |
Here are some more numbers to try:
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