A:
Positive:
1 x 665575155 x 1331150323 x 2893805115 x 578761449 x 1482351289 x 516352245 x 296476445 x 10327
Negative:
-1 x -66557515-5 x -13311503-23 x -2893805-115 x -578761-449 x -148235-1289 x -51635-2245 x -29647-6445 x -10327
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 66,557,515, 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 | 66,557,515 | |
| -1 | -66,557,515 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 66,557,515.
Example:
1 x 66,557,515 = 66,557,515
and
-1 x -66,557,515 = 66,557,515
Notice both answers equal 66,557,515
With that explanation out of the way, let's continue. Next, we take the number 66,557,515 and divide it by 2:
66,557,515 ÷ 2 = 33,278,757.5
If the quotient is a whole number, then 2 and 33,278,757.5 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 | 66,557,515 | |
| -1 | -66,557,515 |
Now, we try dividing 66,557,515 by 3:
66,557,515 ÷ 3 = 22,185,838.3333
If the quotient is a whole number, then 3 and 22,185,838.3333 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 | 66,557,515 | |
| -1 | -66,557,515 |
Let's try dividing by 4:
66,557,515 ÷ 4 = 16,639,378.75
If the quotient is a whole number, then 4 and 16,639,378.75 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 | 66,557,515 | |
| -1 | 66,557,515 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 115 | 449 | 1,289 | 2,245 | 6,445 | 10,327 | 29,647 | 51,635 | 148,235 | 578,761 | 2,893,805 | 13,311,503 | 66,557,515 |
| -1 | -5 | -23 | -115 | -449 | -1,289 | -2,245 | -6,445 | -10,327 | -29,647 | -51,635 | -148,235 | -578,761 | -2,893,805 | -13,311,503 | -66,557,515 |
Here are some more numbers to try:
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