A:
Positive:
1 x 3212020155 x 6424040323 x 13965305115 x 2793061409 x 7853352045 x 1570676829 x 470359407 x 34145
Negative:
-1 x -321202015-5 x -64240403-23 x -13965305-115 x -2793061-409 x -785335-2045 x -157067-6829 x -47035-9407 x -34145
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 321,202,015, 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 | 321,202,015 | |
| -1 | -321,202,015 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 321,202,015.
Example:
1 x 321,202,015 = 321,202,015
and
-1 x -321,202,015 = 321,202,015
Notice both answers equal 321,202,015
With that explanation out of the way, let's continue. Next, we take the number 321,202,015 and divide it by 2:
321,202,015 ÷ 2 = 160,601,007.5
If the quotient is a whole number, then 2 and 160,601,007.5 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 | 321,202,015 | |
| -1 | -321,202,015 |
Now, we try dividing 321,202,015 by 3:
321,202,015 ÷ 3 = 107,067,338.3333
If the quotient is a whole number, then 3 and 107,067,338.3333 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 | 321,202,015 | |
| -1 | -321,202,015 |
Let's try dividing by 4:
321,202,015 ÷ 4 = 80,300,503.75
If the quotient is a whole number, then 4 and 80,300,503.75 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 | 321,202,015 | |
| -1 | 321,202,015 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 115 | 409 | 2,045 | 6,829 | 9,407 | 34,145 | 47,035 | 157,067 | 785,335 | 2,793,061 | 13,965,305 | 64,240,403 | 321,202,015 |
| -1 | -5 | -23 | -115 | -409 | -2,045 | -6,829 | -9,407 | -34,145 | -47,035 | -157,067 | -785,335 | -2,793,061 | -13,965,305 | -64,240,403 | -321,202,015 |
Here are some more numbers to try:
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