A:
Positive:
1 x 5114325711 x 464938779 x 647383229 x 223333257 x 199001869 x 588532519 x 203032827 x 18091
Negative:
-1 x -51143257-11 x -4649387-79 x -647383-229 x -223333-257 x -199001-869 x -58853-2519 x -20303-2827 x -18091
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 51,143,257, 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 | 51,143,257 | |
| -1 | -51,143,257 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 51,143,257.
Example:
1 x 51,143,257 = 51,143,257
and
-1 x -51,143,257 = 51,143,257
Notice both answers equal 51,143,257
With that explanation out of the way, let's continue. Next, we take the number 51,143,257 and divide it by 2:
51,143,257 ÷ 2 = 25,571,628.5
If the quotient is a whole number, then 2 and 25,571,628.5 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 | 51,143,257 | |
| -1 | -51,143,257 |
Now, we try dividing 51,143,257 by 3:
51,143,257 ÷ 3 = 17,047,752.3333
If the quotient is a whole number, then 3 and 17,047,752.3333 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 | 51,143,257 | |
| -1 | -51,143,257 |
Let's try dividing by 4:
51,143,257 ÷ 4 = 12,785,814.25
If the quotient is a whole number, then 4 and 12,785,814.25 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 | 51,143,257 | |
| -1 | 51,143,257 |
If you did it right, you will end up with this table:
| 1 | 11 | 79 | 229 | 257 | 869 | 2,519 | 2,827 | 18,091 | 20,303 | 58,853 | 199,001 | 223,333 | 647,383 | 4,649,387 | 51,143,257 |
| -1 | -11 | -79 | -229 | -257 | -869 | -2,519 | -2,827 | -18,091 | -20,303 | -58,853 | -199,001 | -223,333 | -647,383 | -4,649,387 | -51,143,257 |
Here are some more numbers to try:
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