A:
Positive:
1 x 2056155 x 4112317 x 1209541 x 501559 x 348585 x 2419205 x 1003295 x 697
Negative:
-1 x -205615-5 x -41123-17 x -12095-41 x -5015-59 x -3485-85 x -2419-205 x -1003-295 x -697
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 205,615, 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 | 205,615 | |
| -1 | -205,615 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 205,615.
Example:
1 x 205,615 = 205,615
and
-1 x -205,615 = 205,615
Notice both answers equal 205,615
With that explanation out of the way, let's continue. Next, we take the number 205,615 and divide it by 2:
205,615 ÷ 2 = 102,807.5
If the quotient is a whole number, then 2 and 102,807.5 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 | 205,615 | |
| -1 | -205,615 |
Now, we try dividing 205,615 by 3:
205,615 ÷ 3 = 68,538.3333
If the quotient is a whole number, then 3 and 68,538.3333 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 | 205,615 | |
| -1 | -205,615 |
Let's try dividing by 4:
205,615 ÷ 4 = 51,403.75
If the quotient is a whole number, then 4 and 51,403.75 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 | 205,615 | |
| -1 | 205,615 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 41 | 59 | 85 | 205 | 295 | 697 | 1,003 | 2,419 | 3,485 | 5,015 | 12,095 | 41,123 | 205,615 |
| -1 | -5 | -17 | -41 | -59 | -85 | -205 | -295 | -697 | -1,003 | -2,419 | -3,485 | -5,015 | -12,095 | -41,123 | -205,615 |
Here are some more numbers to try:
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