A:
Positive:
1 x 2114335155 x 4228670341 x 5156915205 x 1031383431 x 4905652155 x 981132393 x 8835511965 x 17671
Negative:
-1 x -211433515-5 x -42286703-41 x -5156915-205 x -1031383-431 x -490565-2155 x -98113-2393 x -88355-11965 x -17671
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 211,433,515, 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 | 211,433,515 | |
| -1 | -211,433,515 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 211,433,515.
Example:
1 x 211,433,515 = 211,433,515
and
-1 x -211,433,515 = 211,433,515
Notice both answers equal 211,433,515
With that explanation out of the way, let's continue. Next, we take the number 211,433,515 and divide it by 2:
211,433,515 ÷ 2 = 105,716,757.5
If the quotient is a whole number, then 2 and 105,716,757.5 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 | 211,433,515 | |
| -1 | -211,433,515 |
Now, we try dividing 211,433,515 by 3:
211,433,515 ÷ 3 = 70,477,838.3333
If the quotient is a whole number, then 3 and 70,477,838.3333 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 | 211,433,515 | |
| -1 | -211,433,515 |
Let's try dividing by 4:
211,433,515 ÷ 4 = 52,858,378.75
If the quotient is a whole number, then 4 and 52,858,378.75 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 | 211,433,515 | |
| -1 | 211,433,515 |
If you did it right, you will end up with this table:
| 1 | 5 | 41 | 205 | 431 | 2,155 | 2,393 | 11,965 | 17,671 | 88,355 | 98,113 | 490,565 | 1,031,383 | 5,156,915 | 42,286,703 | 211,433,515 |
| -1 | -5 | -41 | -205 | -431 | -2,155 | -2,393 | -11,965 | -17,671 | -88,355 | -98,113 | -490,565 | -1,031,383 | -5,156,915 | -42,286,703 | -211,433,515 |
Here are some more numbers to try:
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