A:
Positive:
1 x 1511212437 x 2158874913 x 1162471149 x 308410759 x 256137791 x 1660673413 x 365911637 x 237239767 x 1970292891 x 522734021 x 375835369 x 28147
Negative:
-1 x -151121243-7 x -21588749-13 x -11624711-49 x -3084107-59 x -2561377-91 x -1660673-413 x -365911-637 x -237239-767 x -197029-2891 x -52273-4021 x -37583-5369 x -28147
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 151,121,243, 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 | 151,121,243 | |
| -1 | -151,121,243 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 151,121,243.
Example:
1 x 151,121,243 = 151,121,243
and
-1 x -151,121,243 = 151,121,243
Notice both answers equal 151,121,243
With that explanation out of the way, let's continue. Next, we take the number 151,121,243 and divide it by 2:
151,121,243 ÷ 2 = 75,560,621.5
If the quotient is a whole number, then 2 and 75,560,621.5 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 | 151,121,243 | |
| -1 | -151,121,243 |
Now, we try dividing 151,121,243 by 3:
151,121,243 ÷ 3 = 50,373,747.6667
If the quotient is a whole number, then 3 and 50,373,747.6667 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 | 151,121,243 | |
| -1 | -151,121,243 |
Let's try dividing by 4:
151,121,243 ÷ 4 = 37,780,310.75
If the quotient is a whole number, then 4 and 37,780,310.75 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 | 151,121,243 | |
| -1 | 151,121,243 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 49 | 59 | 91 | 413 | 637 | 767 | 2,891 | 4,021 | 5,369 | 28,147 | 37,583 | 52,273 | 197,029 | 237,239 | 365,911 | 1,660,673 | 2,561,377 | 3,084,107 | 11,624,711 | 21,588,749 | 151,121,243 |
| -1 | -7 | -13 | -49 | -59 | -91 | -413 | -637 | -767 | -2,891 | -4,021 | -5,369 | -28,147 | -37,583 | -52,273 | -197,029 | -237,239 | -365,911 | -1,660,673 | -2,561,377 | -3,084,107 | -11,624,711 | -21,588,749 | -151,121,243 |
Here are some more numbers to try:
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