A:
Positive:
1 x 2518268655 x 5036537317 x 1481334529 x 868368585 x 2962669145 x 1736737493 x 5108052465 x 102161
Negative:
-1 x -251826865-5 x -50365373-17 x -14813345-29 x -8683685-85 x -2962669-145 x -1736737-493 x -510805-2465 x -102161
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 251,826,865, 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 | 251,826,865 | |
| -1 | -251,826,865 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 251,826,865.
Example:
1 x 251,826,865 = 251,826,865
and
-1 x -251,826,865 = 251,826,865
Notice both answers equal 251,826,865
With that explanation out of the way, let's continue. Next, we take the number 251,826,865 and divide it by 2:
251,826,865 ÷ 2 = 125,913,432.5
If the quotient is a whole number, then 2 and 125,913,432.5 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 | 251,826,865 | |
| -1 | -251,826,865 |
Now, we try dividing 251,826,865 by 3:
251,826,865 ÷ 3 = 83,942,288.3333
If the quotient is a whole number, then 3 and 83,942,288.3333 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 | 251,826,865 | |
| -1 | -251,826,865 |
Let's try dividing by 4:
251,826,865 ÷ 4 = 62,956,716.25
If the quotient is a whole number, then 4 and 62,956,716.25 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 | 251,826,865 | |
| -1 | 251,826,865 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 29 | 85 | 145 | 493 | 2,465 | 102,161 | 510,805 | 1,736,737 | 2,962,669 | 8,683,685 | 14,813,345 | 50,365,373 | 251,826,865 |
| -1 | -5 | -17 | -29 | -85 | -145 | -493 | -2,465 | -102,161 | -510,805 | -1,736,737 | -2,962,669 | -8,683,685 | -14,813,345 | -50,365,373 | -251,826,865 |
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