A:
Positive:
1 x 21552511319 x 1134342731 x 6952423277 x 778069589 x 3659171321 x 1631535263 x 409518587 x 25099
Negative:
-1 x -215525113-19 x -11343427-31 x -6952423-277 x -778069-589 x -365917-1321 x -163153-5263 x -40951-8587 x -25099
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 215,525,113, 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 | 215,525,113 | |
| -1 | -215,525,113 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 215,525,113.
Example:
1 x 215,525,113 = 215,525,113
and
-1 x -215,525,113 = 215,525,113
Notice both answers equal 215,525,113
With that explanation out of the way, let's continue. Next, we take the number 215,525,113 and divide it by 2:
215,525,113 ÷ 2 = 107,762,556.5
If the quotient is a whole number, then 2 and 107,762,556.5 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 | 215,525,113 | |
| -1 | -215,525,113 |
Now, we try dividing 215,525,113 by 3:
215,525,113 ÷ 3 = 71,841,704.3333
If the quotient is a whole number, then 3 and 71,841,704.3333 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 | 215,525,113 | |
| -1 | -215,525,113 |
Let's try dividing by 4:
215,525,113 ÷ 4 = 53,881,278.25
If the quotient is a whole number, then 4 and 53,881,278.25 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 | 215,525,113 | |
| -1 | 215,525,113 |
If you did it right, you will end up with this table:
| 1 | 19 | 31 | 277 | 589 | 1,321 | 5,263 | 8,587 | 25,099 | 40,951 | 163,153 | 365,917 | 778,069 | 6,952,423 | 11,343,427 | 215,525,113 |
| -1 | -19 | -31 | -277 | -589 | -1,321 | -5,263 | -8,587 | -25,099 | -40,951 | -163,153 | -365,917 | -778,069 | -6,952,423 | -11,343,427 | -215,525,113 |
Here are some more numbers to try:
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