A:
Positive:
1 x 66722161319 x 35116927167 x 3995339439 x 1519867479 x 13929473173 x 2102818341 x 799939101 x 73313
Negative:
-1 x -667221613-19 x -35116927-167 x -3995339-439 x -1519867-479 x -1392947-3173 x -210281-8341 x -79993-9101 x -73313
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 667,221,613, 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 | 667,221,613 | |
| -1 | -667,221,613 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 667,221,613.
Example:
1 x 667,221,613 = 667,221,613
and
-1 x -667,221,613 = 667,221,613
Notice both answers equal 667,221,613
With that explanation out of the way, let's continue. Next, we take the number 667,221,613 and divide it by 2:
667,221,613 ÷ 2 = 333,610,806.5
If the quotient is a whole number, then 2 and 333,610,806.5 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 | 667,221,613 | |
| -1 | -667,221,613 |
Now, we try dividing 667,221,613 by 3:
667,221,613 ÷ 3 = 222,407,204.3333
If the quotient is a whole number, then 3 and 222,407,204.3333 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 | 667,221,613 | |
| -1 | -667,221,613 |
Let's try dividing by 4:
667,221,613 ÷ 4 = 166,805,403.25
If the quotient is a whole number, then 4 and 166,805,403.25 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 | 667,221,613 | |
| -1 | 667,221,613 |
If you did it right, you will end up with this table:
| 1 | 19 | 167 | 439 | 479 | 3,173 | 8,341 | 9,101 | 73,313 | 79,993 | 210,281 | 1,392,947 | 1,519,867 | 3,995,339 | 35,116,927 | 667,221,613 |
| -1 | -19 | -167 | -439 | -479 | -3,173 | -8,341 | -9,101 | -73,313 | -79,993 | -210,281 | -1,392,947 | -1,519,867 | -3,995,339 | -35,116,927 | -667,221,613 |
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