A:
Positive:
1 x 428015055 x 856030123 x 1860935115 x 372187223 x 1919351115 x 383871669 x 256455129 x 8345
Negative:
-1 x -42801505-5 x -8560301-23 x -1860935-115 x -372187-223 x -191935-1115 x -38387-1669 x -25645-5129 x -8345
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 42,801,505, 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 | 42,801,505 | |
| -1 | -42,801,505 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 42,801,505.
Example:
1 x 42,801,505 = 42,801,505
and
-1 x -42,801,505 = 42,801,505
Notice both answers equal 42,801,505
With that explanation out of the way, let's continue. Next, we take the number 42,801,505 and divide it by 2:
42,801,505 ÷ 2 = 21,400,752.5
If the quotient is a whole number, then 2 and 21,400,752.5 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 | 42,801,505 | |
| -1 | -42,801,505 |
Now, we try dividing 42,801,505 by 3:
42,801,505 ÷ 3 = 14,267,168.3333
If the quotient is a whole number, then 3 and 14,267,168.3333 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 | 42,801,505 | |
| -1 | -42,801,505 |
Let's try dividing by 4:
42,801,505 ÷ 4 = 10,700,376.25
If the quotient is a whole number, then 4 and 10,700,376.25 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 | 42,801,505 | |
| -1 | 42,801,505 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 115 | 223 | 1,115 | 1,669 | 5,129 | 8,345 | 25,645 | 38,387 | 191,935 | 372,187 | 1,860,935 | 8,560,301 | 42,801,505 |
| -1 | -5 | -23 | -115 | -223 | -1,115 | -1,669 | -5,129 | -8,345 | -25,645 | -38,387 | -191,935 | -372,187 | -1,860,935 | -8,560,301 | -42,801,505 |
Here are some more numbers to try:
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