A:
Positive:
1 x 20501239729 x 706939373 x 2808389113 x 1814269857 x 2392212117 x 968413277 x 625618249 x 24853
Negative:
-1 x -205012397-29 x -7069393-73 x -2808389-113 x -1814269-857 x -239221-2117 x -96841-3277 x -62561-8249 x -24853
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 205,012,397, 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 | 205,012,397 | |
| -1 | -205,012,397 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 205,012,397.
Example:
1 x 205,012,397 = 205,012,397
and
-1 x -205,012,397 = 205,012,397
Notice both answers equal 205,012,397
With that explanation out of the way, let's continue. Next, we take the number 205,012,397 and divide it by 2:
205,012,397 ÷ 2 = 102,506,198.5
If the quotient is a whole number, then 2 and 102,506,198.5 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 | 205,012,397 | |
| -1 | -205,012,397 |
Now, we try dividing 205,012,397 by 3:
205,012,397 ÷ 3 = 68,337,465.6667
If the quotient is a whole number, then 3 and 68,337,465.6667 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 | 205,012,397 | |
| -1 | -205,012,397 |
Let's try dividing by 4:
205,012,397 ÷ 4 = 51,253,099.25
If the quotient is a whole number, then 4 and 51,253,099.25 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 | 205,012,397 | |
| -1 | 205,012,397 |
If you did it right, you will end up with this table:
| 1 | 29 | 73 | 113 | 857 | 2,117 | 3,277 | 8,249 | 24,853 | 62,561 | 96,841 | 239,221 | 1,814,269 | 2,808,389 | 7,069,393 | 205,012,397 |
| -1 | -29 | -73 | -113 | -857 | -2,117 | -3,277 | -8,249 | -24,853 | -62,561 | -96,841 | -239,221 | -1,814,269 | -2,808,389 | -7,069,393 | -205,012,397 |
Here are some more numbers to try:
Try the factor calculator