A:
Positive:
1 x 664426255 x 1328852525 x 265770529 x 2291125125 x 531541145 x 458225725 x 916453625 x 18329
Negative:
-1 x -66442625-5 x -13288525-25 x -2657705-29 x -2291125-125 x -531541-145 x -458225-725 x -91645-3625 x -18329
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 66,442,625, 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 | 66,442,625 | |
| -1 | -66,442,625 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 66,442,625.
Example:
1 x 66,442,625 = 66,442,625
and
-1 x -66,442,625 = 66,442,625
Notice both answers equal 66,442,625
With that explanation out of the way, let's continue. Next, we take the number 66,442,625 and divide it by 2:
66,442,625 ÷ 2 = 33,221,312.5
If the quotient is a whole number, then 2 and 33,221,312.5 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 | 66,442,625 | |
| -1 | -66,442,625 |
Now, we try dividing 66,442,625 by 3:
66,442,625 ÷ 3 = 22,147,541.6667
If the quotient is a whole number, then 3 and 22,147,541.6667 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 | 66,442,625 | |
| -1 | -66,442,625 |
Let's try dividing by 4:
66,442,625 ÷ 4 = 16,610,656.25
If the quotient is a whole number, then 4 and 16,610,656.25 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 | 66,442,625 | |
| -1 | 66,442,625 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 29 | 125 | 145 | 725 | 3,625 | 18,329 | 91,645 | 458,225 | 531,541 | 2,291,125 | 2,657,705 | 13,288,525 | 66,442,625 |
| -1 | -5 | -25 | -29 | -125 | -145 | -725 | -3,625 | -18,329 | -91,645 | -458,225 | -531,541 | -2,291,125 | -2,657,705 | -13,288,525 | -66,442,625 |
Here are some more numbers to try:
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