A:
Positive:
1 x 2050134555 x 4100269117 x 1205961585 x 2411923151 x 1357705755 x 2715412567 x 7986512835 x 15973
Negative:
-1 x -205013455-5 x -41002691-17 x -12059615-85 x -2411923-151 x -1357705-755 x -271541-2567 x -79865-12835 x -15973
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 205,013,455, 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 | 205,013,455 | |
| -1 | -205,013,455 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 205,013,455.
Example:
1 x 205,013,455 = 205,013,455
and
-1 x -205,013,455 = 205,013,455
Notice both answers equal 205,013,455
With that explanation out of the way, let's continue. Next, we take the number 205,013,455 and divide it by 2:
205,013,455 ÷ 2 = 102,506,727.5
If the quotient is a whole number, then 2 and 102,506,727.5 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 | 205,013,455 | |
| -1 | -205,013,455 |
Now, we try dividing 205,013,455 by 3:
205,013,455 ÷ 3 = 68,337,818.3333
If the quotient is a whole number, then 3 and 68,337,818.3333 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 | 205,013,455 | |
| -1 | -205,013,455 |
Let's try dividing by 4:
205,013,455 ÷ 4 = 51,253,363.75
If the quotient is a whole number, then 4 and 51,253,363.75 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 | 205,013,455 | |
| -1 | 205,013,455 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 85 | 151 | 755 | 2,567 | 12,835 | 15,973 | 79,865 | 271,541 | 1,357,705 | 2,411,923 | 12,059,615 | 41,002,691 | 205,013,455 |
| -1 | -5 | -17 | -85 | -151 | -755 | -2,567 | -12,835 | -15,973 | -79,865 | -271,541 | -1,357,705 | -2,411,923 | -12,059,615 | -41,002,691 | -205,013,455 |
Here are some more numbers to try:
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