A:
Positive:
1 x 203103555 x 406207113 x 156233565 x 312467193 x 105235965 x 210471619 x 125452509 x 8095
Negative:
-1 x -20310355-5 x -4062071-13 x -1562335-65 x -312467-193 x -105235-965 x -21047-1619 x -12545-2509 x -8095
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 20,310,355, 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 | 20,310,355 | |
| -1 | -20,310,355 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,310,355.
Example:
1 x 20,310,355 = 20,310,355
and
-1 x -20,310,355 = 20,310,355
Notice both answers equal 20,310,355
With that explanation out of the way, let's continue. Next, we take the number 20,310,355 and divide it by 2:
20,310,355 ÷ 2 = 10,155,177.5
If the quotient is a whole number, then 2 and 10,155,177.5 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 | 20,310,355 | |
| -1 | -20,310,355 |
Now, we try dividing 20,310,355 by 3:
20,310,355 ÷ 3 = 6,770,118.3333
If the quotient is a whole number, then 3 and 6,770,118.3333 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 | 20,310,355 | |
| -1 | -20,310,355 |
Let's try dividing by 4:
20,310,355 ÷ 4 = 5,077,588.75
If the quotient is a whole number, then 4 and 5,077,588.75 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 | 20,310,355 | |
| -1 | 20,310,355 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 193 | 965 | 1,619 | 2,509 | 8,095 | 12,545 | 21,047 | 105,235 | 312,467 | 1,562,335 | 4,062,071 | 20,310,355 |
| -1 | -5 | -13 | -65 | -193 | -965 | -1,619 | -2,509 | -8,095 | -12,545 | -21,047 | -105,235 | -312,467 | -1,562,335 | -4,062,071 | -20,310,355 |
Here are some more numbers to try:
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