A:
Positive:
1 x 420032055 x 840064119 x 221069595 x 442139
Negative:
-1 x -42003205-5 x -8400641-19 x -2210695-95 x -442139
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 42,003,205, 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 | 42,003,205 | |
| -1 | -42,003,205 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 42,003,205.
Example:
1 x 42,003,205 = 42,003,205
and
-1 x -42,003,205 = 42,003,205
Notice both answers equal 42,003,205
With that explanation out of the way, let's continue. Next, we take the number 42,003,205 and divide it by 2:
42,003,205 ÷ 2 = 21,001,602.5
If the quotient is a whole number, then 2 and 21,001,602.5 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 | 42,003,205 | |
| -1 | -42,003,205 |
Now, we try dividing 42,003,205 by 3:
42,003,205 ÷ 3 = 14,001,068.3333
If the quotient is a whole number, then 3 and 14,001,068.3333 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 | 42,003,205 | |
| -1 | -42,003,205 |
Let's try dividing by 4:
42,003,205 ÷ 4 = 10,500,801.25
If the quotient is a whole number, then 4 and 10,500,801.25 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 | 42,003,205 | |
| -1 | 42,003,205 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 95 | 442,139 | 2,210,695 | 8,400,641 | 42,003,205 |
| -1 | -5 | -19 | -95 | -442,139 | -2,210,695 | -8,400,641 | -42,003,205 |
Here are some more numbers to try:
Try the factor calculator