A:
Positive:
1 x 200806155 x 401612329 x 69243579 x 254185145 x 138487395 x 508371753 x 114552291 x 8765
Negative:
-1 x -20080615-5 x -4016123-29 x -692435-79 x -254185-145 x -138487-395 x -50837-1753 x -11455-2291 x -8765
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 20,080,615, 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 | 20,080,615 | |
| -1 | -20,080,615 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,080,615.
Example:
1 x 20,080,615 = 20,080,615
and
-1 x -20,080,615 = 20,080,615
Notice both answers equal 20,080,615
With that explanation out of the way, let's continue. Next, we take the number 20,080,615 and divide it by 2:
20,080,615 ÷ 2 = 10,040,307.5
If the quotient is a whole number, then 2 and 10,040,307.5 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 | 20,080,615 | |
| -1 | -20,080,615 |
Now, we try dividing 20,080,615 by 3:
20,080,615 ÷ 3 = 6,693,538.3333
If the quotient is a whole number, then 3 and 6,693,538.3333 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 | 20,080,615 | |
| -1 | -20,080,615 |
Let's try dividing by 4:
20,080,615 ÷ 4 = 5,020,153.75
If the quotient is a whole number, then 4 and 5,020,153.75 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 | 20,080,615 | |
| -1 | 20,080,615 |
If you did it right, you will end up with this table:
| 1 | 5 | 29 | 79 | 145 | 395 | 1,753 | 2,291 | 8,765 | 11,455 | 50,837 | 138,487 | 254,185 | 692,435 | 4,016,123 | 20,080,615 |
| -1 | -5 | -29 | -79 | -145 | -395 | -1,753 | -2,291 | -8,765 | -11,455 | -50,837 | -138,487 | -254,185 | -692,435 | -4,016,123 | -20,080,615 |
Here are some more numbers to try:
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