A:
Positive:
1 x 4020311355 x 8040622711 x 3654828555 x 7309657881 x 4563354405 x 912678297 x 484559691 x 41485
Negative:
-1 x -402031135-5 x -80406227-11 x -36548285-55 x -7309657-881 x -456335-4405 x -91267-8297 x -48455-9691 x -41485
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 402,031,135, 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 | 402,031,135 | |
| -1 | -402,031,135 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 402,031,135.
Example:
1 x 402,031,135 = 402,031,135
and
-1 x -402,031,135 = 402,031,135
Notice both answers equal 402,031,135
With that explanation out of the way, let's continue. Next, we take the number 402,031,135 and divide it by 2:
402,031,135 ÷ 2 = 201,015,567.5
If the quotient is a whole number, then 2 and 201,015,567.5 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 | 402,031,135 | |
| -1 | -402,031,135 |
Now, we try dividing 402,031,135 by 3:
402,031,135 ÷ 3 = 134,010,378.3333
If the quotient is a whole number, then 3 and 134,010,378.3333 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 | 402,031,135 | |
| -1 | -402,031,135 |
Let's try dividing by 4:
402,031,135 ÷ 4 = 100,507,783.75
If the quotient is a whole number, then 4 and 100,507,783.75 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 | 402,031,135 | |
| -1 | 402,031,135 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 881 | 4,405 | 8,297 | 9,691 | 41,485 | 48,455 | 91,267 | 456,335 | 7,309,657 | 36,548,285 | 80,406,227 | 402,031,135 |
| -1 | -5 | -11 | -55 | -881 | -4,405 | -8,297 | -9,691 | -41,485 | -48,455 | -91,267 | -456,335 | -7,309,657 | -36,548,285 | -80,406,227 | -402,031,135 |
Here are some more numbers to try:
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