A:
Positive:
1 x 3214032055 x 6428064161 x 526890579 x 4068395305 x 1053781395 x 8136794819 x 6669513339 x 24095
Negative:
-1 x -321403205-5 x -64280641-61 x -5268905-79 x -4068395-305 x -1053781-395 x -813679-4819 x -66695-13339 x -24095
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 321,403,205, 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 | 321,403,205 | |
| -1 | -321,403,205 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 321,403,205.
Example:
1 x 321,403,205 = 321,403,205
and
-1 x -321,403,205 = 321,403,205
Notice both answers equal 321,403,205
With that explanation out of the way, let's continue. Next, we take the number 321,403,205 and divide it by 2:
321,403,205 ÷ 2 = 160,701,602.5
If the quotient is a whole number, then 2 and 160,701,602.5 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 | 321,403,205 | |
| -1 | -321,403,205 |
Now, we try dividing 321,403,205 by 3:
321,403,205 ÷ 3 = 107,134,401.6667
If the quotient is a whole number, then 3 and 107,134,401.6667 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 | 321,403,205 | |
| -1 | -321,403,205 |
Let's try dividing by 4:
321,403,205 ÷ 4 = 80,350,801.25
If the quotient is a whole number, then 4 and 80,350,801.25 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 | 321,403,205 | |
| -1 | 321,403,205 |
If you did it right, you will end up with this table:
| 1 | 5 | 61 | 79 | 305 | 395 | 4,819 | 13,339 | 24,095 | 66,695 | 813,679 | 1,053,781 | 4,068,395 | 5,268,905 | 64,280,641 | 321,403,205 |
| -1 | -5 | -61 | -79 | -305 | -395 | -4,819 | -13,339 | -24,095 | -66,695 | -813,679 | -1,053,781 | -4,068,395 | -5,268,905 | -64,280,641 | -321,403,205 |
Here are some more numbers to try:
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