A:
Positive:
1 x 20555113711 x 1868646743 x 478025973 x 2815769473 x 434569803 x 2559793139 x 654835953 x 34529
Negative:
-1 x -205551137-11 x -18686467-43 x -4780259-73 x -2815769-473 x -434569-803 x -255979-3139 x -65483-5953 x -34529
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 205,551,137, 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 | 205,551,137 | |
| -1 | -205,551,137 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 205,551,137.
Example:
1 x 205,551,137 = 205,551,137
and
-1 x -205,551,137 = 205,551,137
Notice both answers equal 205,551,137
With that explanation out of the way, let's continue. Next, we take the number 205,551,137 and divide it by 2:
205,551,137 ÷ 2 = 102,775,568.5
If the quotient is a whole number, then 2 and 102,775,568.5 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 | 205,551,137 | |
| -1 | -205,551,137 |
Now, we try dividing 205,551,137 by 3:
205,551,137 ÷ 3 = 68,517,045.6667
If the quotient is a whole number, then 3 and 68,517,045.6667 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 | 205,551,137 | |
| -1 | -205,551,137 |
Let's try dividing by 4:
205,551,137 ÷ 4 = 51,387,784.25
If the quotient is a whole number, then 4 and 51,387,784.25 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 | 205,551,137 | |
| -1 | 205,551,137 |
If you did it right, you will end up with this table:
| 1 | 11 | 43 | 73 | 473 | 803 | 3,139 | 5,953 | 34,529 | 65,483 | 255,979 | 434,569 | 2,815,769 | 4,780,259 | 18,686,467 | 205,551,137 |
| -1 | -11 | -43 | -73 | -473 | -803 | -3,139 | -5,953 | -34,529 | -65,483 | -255,979 | -434,569 | -2,815,769 | -4,780,259 | -18,686,467 | -205,551,137 |
Here are some more numbers to try:
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