A:
Positive:
1 x 203171155 x 40634237 x 290244513 x 156285535 x 58048949 x 41463565 x 31257191 x 223265245 x 82927455 x 44653637 x 318953185 x 6379
Negative:
-1 x -20317115-5 x -4063423-7 x -2902445-13 x -1562855-35 x -580489-49 x -414635-65 x -312571-91 x -223265-245 x -82927-455 x -44653-637 x -31895-3185 x -6379
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 20,317,115, 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 | 20,317,115 | |
| -1 | -20,317,115 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,317,115.
Example:
1 x 20,317,115 = 20,317,115
and
-1 x -20,317,115 = 20,317,115
Notice both answers equal 20,317,115
With that explanation out of the way, let's continue. Next, we take the number 20,317,115 and divide it by 2:
20,317,115 ÷ 2 = 10,158,557.5
If the quotient is a whole number, then 2 and 10,158,557.5 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 | 20,317,115 | |
| -1 | -20,317,115 |
Now, we try dividing 20,317,115 by 3:
20,317,115 ÷ 3 = 6,772,371.6667
If the quotient is a whole number, then 3 and 6,772,371.6667 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 | 20,317,115 | |
| -1 | -20,317,115 |
Let's try dividing by 4:
20,317,115 ÷ 4 = 5,079,278.75
If the quotient is a whole number, then 4 and 5,079,278.75 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 | 20,317,115 | |
| -1 | 20,317,115 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 13 | 35 | 49 | 65 | 91 | 245 | 455 | 637 | 3,185 | 6,379 | 31,895 | 44,653 | 82,927 | 223,265 | 312,571 | 414,635 | 580,489 | 1,562,855 | 2,902,445 | 4,063,423 | 20,317,115 |
| -1 | -5 | -7 | -13 | -35 | -49 | -65 | -91 | -245 | -455 | -637 | -3,185 | -6,379 | -31,895 | -44,653 | -82,927 | -223,265 | -312,571 | -414,635 | -580,489 | -1,562,855 | -2,902,445 | -4,063,423 | -20,317,115 |
Here are some more numbers to try:
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