A:
Positive:
1 x 2120111155 x 4240222367 x 316434579 x 2683685335 x 632869395 x 5367375293 x 400558011 x 26465
Negative:
-1 x -212011115-5 x -42402223-67 x -3164345-79 x -2683685-335 x -632869-395 x -536737-5293 x -40055-8011 x -26465
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 212,011,115, 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 | 212,011,115 | |
| -1 | -212,011,115 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 212,011,115.
Example:
1 x 212,011,115 = 212,011,115
and
-1 x -212,011,115 = 212,011,115
Notice both answers equal 212,011,115
With that explanation out of the way, let's continue. Next, we take the number 212,011,115 and divide it by 2:
212,011,115 ÷ 2 = 106,005,557.5
If the quotient is a whole number, then 2 and 106,005,557.5 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 | 212,011,115 | |
| -1 | -212,011,115 |
Now, we try dividing 212,011,115 by 3:
212,011,115 ÷ 3 = 70,670,371.6667
If the quotient is a whole number, then 3 and 70,670,371.6667 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 | 212,011,115 | |
| -1 | -212,011,115 |
Let's try dividing by 4:
212,011,115 ÷ 4 = 53,002,778.75
If the quotient is a whole number, then 4 and 53,002,778.75 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 | 212,011,115 | |
| -1 | 212,011,115 |
If you did it right, you will end up with this table:
| 1 | 5 | 67 | 79 | 335 | 395 | 5,293 | 8,011 | 26,465 | 40,055 | 536,737 | 632,869 | 2,683,685 | 3,164,345 | 42,402,223 | 212,011,115 |
| -1 | -5 | -67 | -79 | -335 | -395 | -5,293 | -8,011 | -26,465 | -40,055 | -536,737 | -632,869 | -2,683,685 | -3,164,345 | -42,402,223 | -212,011,115 |
Here are some more numbers to try:
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