A:
Positive:
1 x 668203755 x 1336407525 x 2672815125 x 534563409 x 1633751307 x 511252045 x 326756535 x 10225
Negative:
-1 x -66820375-5 x -13364075-25 x -2672815-125 x -534563-409 x -163375-1307 x -51125-2045 x -32675-6535 x -10225
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 66,820,375, 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 | 66,820,375 | |
| -1 | -66,820,375 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 66,820,375.
Example:
1 x 66,820,375 = 66,820,375
and
-1 x -66,820,375 = 66,820,375
Notice both answers equal 66,820,375
With that explanation out of the way, let's continue. Next, we take the number 66,820,375 and divide it by 2:
66,820,375 ÷ 2 = 33,410,187.5
If the quotient is a whole number, then 2 and 33,410,187.5 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 | 66,820,375 | |
| -1 | -66,820,375 |
Now, we try dividing 66,820,375 by 3:
66,820,375 ÷ 3 = 22,273,458.3333
If the quotient is a whole number, then 3 and 22,273,458.3333 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 | 66,820,375 | |
| -1 | -66,820,375 |
Let's try dividing by 4:
66,820,375 ÷ 4 = 16,705,093.75
If the quotient is a whole number, then 4 and 16,705,093.75 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 | 66,820,375 | |
| -1 | 66,820,375 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 125 | 409 | 1,307 | 2,045 | 6,535 | 10,225 | 32,675 | 51,125 | 163,375 | 534,563 | 2,672,815 | 13,364,075 | 66,820,375 |
| -1 | -5 | -25 | -125 | -409 | -1,307 | -2,045 | -6,535 | -10,225 | -32,675 | -51,125 | -163,375 | -534,563 | -2,672,815 | -13,364,075 | -66,820,375 |
Here are some more numbers to try:
Try the factor calculator