A:
Positive:
1 x 3200431155 x 640086237 x 4572044535 x 9144089359 x 8914851795 x 1782972513 x 12735512565 x 25471
Negative:
-1 x -320043115-5 x -64008623-7 x -45720445-35 x -9144089-359 x -891485-1795 x -178297-2513 x -127355-12565 x -25471
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 320,043,115, 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 | 320,043,115 | |
| -1 | -320,043,115 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 320,043,115.
Example:
1 x 320,043,115 = 320,043,115
and
-1 x -320,043,115 = 320,043,115
Notice both answers equal 320,043,115
With that explanation out of the way, let's continue. Next, we take the number 320,043,115 and divide it by 2:
320,043,115 ÷ 2 = 160,021,557.5
If the quotient is a whole number, then 2 and 160,021,557.5 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 | 320,043,115 | |
| -1 | -320,043,115 |
Now, we try dividing 320,043,115 by 3:
320,043,115 ÷ 3 = 106,681,038.3333
If the quotient is a whole number, then 3 and 106,681,038.3333 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 | 320,043,115 | |
| -1 | -320,043,115 |
Let's try dividing by 4:
320,043,115 ÷ 4 = 80,010,778.75
If the quotient is a whole number, then 4 and 80,010,778.75 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 | 320,043,115 | |
| -1 | 320,043,115 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 359 | 1,795 | 2,513 | 12,565 | 25,471 | 127,355 | 178,297 | 891,485 | 9,144,089 | 45,720,445 | 64,008,623 | 320,043,115 |
| -1 | -5 | -7 | -35 | -359 | -1,795 | -2,513 | -12,565 | -25,471 | -127,355 | -178,297 | -891,485 | -9,144,089 | -45,720,445 | -64,008,623 | -320,043,115 |
Here are some more numbers to try:
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