A:
Positive:
1 x 203486155 x 40697237 x 290694535 x 581389281 x 724151405 x 144831967 x 103452069 x 9835
Negative:
-1 x -20348615-5 x -4069723-7 x -2906945-35 x -581389-281 x -72415-1405 x -14483-1967 x -10345-2069 x -9835
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 20,348,615, 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 | 20,348,615 | |
| -1 | -20,348,615 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,348,615.
Example:
1 x 20,348,615 = 20,348,615
and
-1 x -20,348,615 = 20,348,615
Notice both answers equal 20,348,615
With that explanation out of the way, let's continue. Next, we take the number 20,348,615 and divide it by 2:
20,348,615 ÷ 2 = 10,174,307.5
If the quotient is a whole number, then 2 and 10,174,307.5 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 | 20,348,615 | |
| -1 | -20,348,615 |
Now, we try dividing 20,348,615 by 3:
20,348,615 ÷ 3 = 6,782,871.6667
If the quotient is a whole number, then 3 and 6,782,871.6667 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 | 20,348,615 | |
| -1 | -20,348,615 |
Let's try dividing by 4:
20,348,615 ÷ 4 = 5,087,153.75
If the quotient is a whole number, then 4 and 5,087,153.75 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 | 20,348,615 | |
| -1 | 20,348,615 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 281 | 1,405 | 1,967 | 2,069 | 9,835 | 10,345 | 14,483 | 72,415 | 581,389 | 2,906,945 | 4,069,723 | 20,348,615 |
| -1 | -5 | -7 | -35 | -281 | -1,405 | -1,967 | -2,069 | -9,835 | -10,345 | -14,483 | -72,415 | -581,389 | -2,906,945 | -4,069,723 | -20,348,615 |
Here are some more numbers to try:
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