A:
Positive:
1 x 21205451311 x 1927768397 x 2186129353 x 600721563 x 3766511067 x 1987393883 x 546116193 x 34241
Negative:
-1 x -212054513-11 x -19277683-97 x -2186129-353 x -600721-563 x -376651-1067 x -198739-3883 x -54611-6193 x -34241
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 212,054,513, 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 | 212,054,513 | |
| -1 | -212,054,513 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 212,054,513.
Example:
1 x 212,054,513 = 212,054,513
and
-1 x -212,054,513 = 212,054,513
Notice both answers equal 212,054,513
With that explanation out of the way, let's continue. Next, we take the number 212,054,513 and divide it by 2:
212,054,513 ÷ 2 = 106,027,256.5
If the quotient is a whole number, then 2 and 106,027,256.5 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 | 212,054,513 | |
| -1 | -212,054,513 |
Now, we try dividing 212,054,513 by 3:
212,054,513 ÷ 3 = 70,684,837.6667
If the quotient is a whole number, then 3 and 70,684,837.6667 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 | 212,054,513 | |
| -1 | -212,054,513 |
Let's try dividing by 4:
212,054,513 ÷ 4 = 53,013,628.25
If the quotient is a whole number, then 4 and 53,013,628.25 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 | 212,054,513 | |
| -1 | 212,054,513 |
If you did it right, you will end up with this table:
| 1 | 11 | 97 | 353 | 563 | 1,067 | 3,883 | 6,193 | 34,241 | 54,611 | 198,739 | 376,651 | 600,721 | 2,186,129 | 19,277,683 | 212,054,513 |
| -1 | -11 | -97 | -353 | -563 | -1,067 | -3,883 | -6,193 | -34,241 | -54,611 | -198,739 | -376,651 | -600,721 | -2,186,129 | -19,277,683 | -212,054,513 |
Here are some more numbers to try:
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