A:
Positive:
1 x 3212150055 x 6424300171 x 4524155355 x 904831479 x 6705951889 x 1700452395 x 1341199445 x 34009
Negative:
-1 x -321215005-5 x -64243001-71 x -4524155-355 x -904831-479 x -670595-1889 x -170045-2395 x -134119-9445 x -34009
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 321,215,005, 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 | 321,215,005 | |
| -1 | -321,215,005 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 321,215,005.
Example:
1 x 321,215,005 = 321,215,005
and
-1 x -321,215,005 = 321,215,005
Notice both answers equal 321,215,005
With that explanation out of the way, let's continue. Next, we take the number 321,215,005 and divide it by 2:
321,215,005 ÷ 2 = 160,607,502.5
If the quotient is a whole number, then 2 and 160,607,502.5 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 | 321,215,005 | |
| -1 | -321,215,005 |
Now, we try dividing 321,215,005 by 3:
321,215,005 ÷ 3 = 107,071,668.3333
If the quotient is a whole number, then 3 and 107,071,668.3333 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 | 321,215,005 | |
| -1 | -321,215,005 |
Let's try dividing by 4:
321,215,005 ÷ 4 = 80,303,751.25
If the quotient is a whole number, then 4 and 80,303,751.25 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 | 321,215,005 | |
| -1 | 321,215,005 |
If you did it right, you will end up with this table:
| 1 | 5 | 71 | 355 | 479 | 1,889 | 2,395 | 9,445 | 34,009 | 134,119 | 170,045 | 670,595 | 904,831 | 4,524,155 | 64,243,001 | 321,215,005 |
| -1 | -5 | -71 | -355 | -479 | -1,889 | -2,395 | -9,445 | -34,009 | -134,119 | -170,045 | -670,595 | -904,831 | -4,524,155 | -64,243,001 | -321,215,005 |
Here are some more numbers to try:
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