A:
Positive:
1 x 6638764129 x 228922947 x 141250353 x 1252597919 x 722391363 x 487071537 x 431932491 x 26651
Negative:
-1 x -66387641-29 x -2289229-47 x -1412503-53 x -1252597-919 x -72239-1363 x -48707-1537 x -43193-2491 x -26651
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 66,387,641, 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 | 66,387,641 | |
| -1 | -66,387,641 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 66,387,641.
Example:
1 x 66,387,641 = 66,387,641
and
-1 x -66,387,641 = 66,387,641
Notice both answers equal 66,387,641
With that explanation out of the way, let's continue. Next, we take the number 66,387,641 and divide it by 2:
66,387,641 ÷ 2 = 33,193,820.5
If the quotient is a whole number, then 2 and 33,193,820.5 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 | 66,387,641 | |
| -1 | -66,387,641 |
Now, we try dividing 66,387,641 by 3:
66,387,641 ÷ 3 = 22,129,213.6667
If the quotient is a whole number, then 3 and 22,129,213.6667 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 | 66,387,641 | |
| -1 | -66,387,641 |
Let's try dividing by 4:
66,387,641 ÷ 4 = 16,596,910.25
If the quotient is a whole number, then 4 and 16,596,910.25 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 | 66,387,641 | |
| -1 | 66,387,641 |
If you did it right, you will end up with this table:
| 1 | 29 | 47 | 53 | 919 | 1,363 | 1,537 | 2,491 | 26,651 | 43,193 | 48,707 | 72,239 | 1,252,597 | 1,412,503 | 2,289,229 | 66,387,641 |
| -1 | -29 | -47 | -53 | -919 | -1,363 | -1,537 | -2,491 | -26,651 | -43,193 | -48,707 | -72,239 | -1,252,597 | -1,412,503 | -2,289,229 | -66,387,641 |
Here are some more numbers to try:
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