A:
Positive:
1 x 6643410655 x 132868213107 x 6208795535 x 1241759953 x 6971051303 x 5098554765 x 1394216515 x 101971
Negative:
-1 x -664341065-5 x -132868213-107 x -6208795-535 x -1241759-953 x -697105-1303 x -509855-4765 x -139421-6515 x -101971
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 664,341,065, 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 | 664,341,065 | |
| -1 | -664,341,065 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 664,341,065.
Example:
1 x 664,341,065 = 664,341,065
and
-1 x -664,341,065 = 664,341,065
Notice both answers equal 664,341,065
With that explanation out of the way, let's continue. Next, we take the number 664,341,065 and divide it by 2:
664,341,065 ÷ 2 = 332,170,532.5
If the quotient is a whole number, then 2 and 332,170,532.5 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 | 664,341,065 | |
| -1 | -664,341,065 |
Now, we try dividing 664,341,065 by 3:
664,341,065 ÷ 3 = 221,447,021.6667
If the quotient is a whole number, then 3 and 221,447,021.6667 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 | 664,341,065 | |
| -1 | -664,341,065 |
Let's try dividing by 4:
664,341,065 ÷ 4 = 166,085,266.25
If the quotient is a whole number, then 4 and 166,085,266.25 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 | 664,341,065 | |
| -1 | 664,341,065 |
If you did it right, you will end up with this table:
| 1 | 5 | 107 | 535 | 953 | 1,303 | 4,765 | 6,515 | 101,971 | 139,421 | 509,855 | 697,105 | 1,241,759 | 6,208,795 | 132,868,213 | 664,341,065 |
| -1 | -5 | -107 | -535 | -953 | -1,303 | -4,765 | -6,515 | -101,971 | -139,421 | -509,855 | -697,105 | -1,241,759 | -6,208,795 | -132,868,213 | -664,341,065 |
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