A:
Positive:
1 x 420305055 x 840610111 x 382095555 x 764191191 x 220055955 x 440112101 x 200054001 x 10505
Negative:
-1 x -42030505-5 x -8406101-11 x -3820955-55 x -764191-191 x -220055-955 x -44011-2101 x -20005-4001 x -10505
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 42,030,505, 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 | 42,030,505 | |
| -1 | -42,030,505 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 42,030,505.
Example:
1 x 42,030,505 = 42,030,505
and
-1 x -42,030,505 = 42,030,505
Notice both answers equal 42,030,505
With that explanation out of the way, let's continue. Next, we take the number 42,030,505 and divide it by 2:
42,030,505 ÷ 2 = 21,015,252.5
If the quotient is a whole number, then 2 and 21,015,252.5 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 | 42,030,505 | |
| -1 | -42,030,505 |
Now, we try dividing 42,030,505 by 3:
42,030,505 ÷ 3 = 14,010,168.3333
If the quotient is a whole number, then 3 and 14,010,168.3333 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 | 42,030,505 | |
| -1 | -42,030,505 |
Let's try dividing by 4:
42,030,505 ÷ 4 = 10,507,626.25
If the quotient is a whole number, then 4 and 10,507,626.25 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 | 42,030,505 | |
| -1 | 42,030,505 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 191 | 955 | 2,101 | 4,001 | 10,505 | 20,005 | 44,011 | 220,055 | 764,191 | 3,820,955 | 8,406,101 | 42,030,505 |
| -1 | -5 | -11 | -55 | -191 | -955 | -2,101 | -4,001 | -10,505 | -20,005 | -44,011 | -220,055 | -764,191 | -3,820,955 | -8,406,101 | -42,030,505 |
Here are some more numbers to try:
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