A:
Positive:
1 x 12351252111 x 1122841119 x 6500659209 x 590969383 x 3224871543 x 800474213 x 293177277 x 16973
Negative:
-1 x -123512521-11 x -11228411-19 x -6500659-209 x -590969-383 x -322487-1543 x -80047-4213 x -29317-7277 x -16973
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 123,512,521, 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 | 123,512,521 | |
| -1 | -123,512,521 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 123,512,521.
Example:
1 x 123,512,521 = 123,512,521
and
-1 x -123,512,521 = 123,512,521
Notice both answers equal 123,512,521
With that explanation out of the way, let's continue. Next, we take the number 123,512,521 and divide it by 2:
123,512,521 ÷ 2 = 61,756,260.5
If the quotient is a whole number, then 2 and 61,756,260.5 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 | 123,512,521 | |
| -1 | -123,512,521 |
Now, we try dividing 123,512,521 by 3:
123,512,521 ÷ 3 = 41,170,840.3333
If the quotient is a whole number, then 3 and 41,170,840.3333 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 | 123,512,521 | |
| -1 | -123,512,521 |
Let's try dividing by 4:
123,512,521 ÷ 4 = 30,878,130.25
If the quotient is a whole number, then 4 and 30,878,130.25 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 | 123,512,521 | |
| -1 | 123,512,521 |
If you did it right, you will end up with this table:
| 1 | 11 | 19 | 209 | 383 | 1,543 | 4,213 | 7,277 | 16,973 | 29,317 | 80,047 | 322,487 | 590,969 | 6,500,659 | 11,228,411 | 123,512,521 |
| -1 | -11 | -19 | -209 | -383 | -1,543 | -4,213 | -7,277 | -16,973 | -29,317 | -80,047 | -322,487 | -590,969 | -6,500,659 | -11,228,411 | -123,512,521 |
Here are some more numbers to try:
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