A:
Positive:
1 x 420136155 x 84027237 x 600194535 x 1200389
Negative:
-1 x -42013615-5 x -8402723-7 x -6001945-35 x -1200389
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 42,013,615, 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 | 42,013,615 | |
| -1 | -42,013,615 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 42,013,615.
Example:
1 x 42,013,615 = 42,013,615
and
-1 x -42,013,615 = 42,013,615
Notice both answers equal 42,013,615
With that explanation out of the way, let's continue. Next, we take the number 42,013,615 and divide it by 2:
42,013,615 ÷ 2 = 21,006,807.5
If the quotient is a whole number, then 2 and 21,006,807.5 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 | 42,013,615 | |
| -1 | -42,013,615 |
Now, we try dividing 42,013,615 by 3:
42,013,615 ÷ 3 = 14,004,538.3333
If the quotient is a whole number, then 3 and 14,004,538.3333 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 | 42,013,615 | |
| -1 | -42,013,615 |
Let's try dividing by 4:
42,013,615 ÷ 4 = 10,503,403.75
If the quotient is a whole number, then 4 and 10,503,403.75 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 | 42,013,615 | |
| -1 | 42,013,615 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 1,200,389 | 6,001,945 | 8,402,723 | 42,013,615 |
| -1 | -5 | -7 | -35 | -1,200,389 | -6,001,945 | -8,402,723 | -42,013,615 |
Here are some more numbers to try:
Try the factor calculator