A:
Positive:
1 x 2120727077 x 3029610111 x 1927933777 x 2754191121 x 1752667227 x 934241847 x 2503811103 x 1922691589 x 1334632497 x 849317721 x 2746712133 x 17479
Negative:
-1 x -212072707-7 x -30296101-11 x -19279337-77 x -2754191-121 x -1752667-227 x -934241-847 x -250381-1103 x -192269-1589 x -133463-2497 x -84931-7721 x -27467-12133 x -17479
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 212,072,707, 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 | 212,072,707 | |
| -1 | -212,072,707 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 212,072,707.
Example:
1 x 212,072,707 = 212,072,707
and
-1 x -212,072,707 = 212,072,707
Notice both answers equal 212,072,707
With that explanation out of the way, let's continue. Next, we take the number 212,072,707 and divide it by 2:
212,072,707 ÷ 2 = 106,036,353.5
If the quotient is a whole number, then 2 and 106,036,353.5 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 | 212,072,707 | |
| -1 | -212,072,707 |
Now, we try dividing 212,072,707 by 3:
212,072,707 ÷ 3 = 70,690,902.3333
If the quotient is a whole number, then 3 and 70,690,902.3333 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 | 212,072,707 | |
| -1 | -212,072,707 |
Let's try dividing by 4:
212,072,707 ÷ 4 = 53,018,176.75
If the quotient is a whole number, then 4 and 53,018,176.75 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 | 212,072,707 | |
| -1 | 212,072,707 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 77 | 121 | 227 | 847 | 1,103 | 1,589 | 2,497 | 7,721 | 12,133 | 17,479 | 27,467 | 84,931 | 133,463 | 192,269 | 250,381 | 934,241 | 1,752,667 | 2,754,191 | 19,279,337 | 30,296,101 | 212,072,707 |
| -1 | -7 | -11 | -77 | -121 | -227 | -847 | -1,103 | -1,589 | -2,497 | -7,721 | -12,133 | -17,479 | -27,467 | -84,931 | -133,463 | -192,269 | -250,381 | -934,241 | -1,752,667 | -2,754,191 | -19,279,337 | -30,296,101 | -212,072,707 |
Here are some more numbers to try:
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