A:
Positive:
1 x 247878477 x 354112147 x 52740159 x 420133329 x 75343413 x 600191277 x 194112773 x 8939
Negative:
-1 x -24787847-7 x -3541121-47 x -527401-59 x -420133-329 x -75343-413 x -60019-1277 x -19411-2773 x -8939
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 24,787,847, 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 | 24,787,847 | |
| -1 | -24,787,847 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 24,787,847.
Example:
1 x 24,787,847 = 24,787,847
and
-1 x -24,787,847 = 24,787,847
Notice both answers equal 24,787,847
With that explanation out of the way, let's continue. Next, we take the number 24,787,847 and divide it by 2:
24,787,847 ÷ 2 = 12,393,923.5
If the quotient is a whole number, then 2 and 12,393,923.5 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 | 24,787,847 | |
| -1 | -24,787,847 |
Now, we try dividing 24,787,847 by 3:
24,787,847 ÷ 3 = 8,262,615.6667
If the quotient is a whole number, then 3 and 8,262,615.6667 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 | 24,787,847 | |
| -1 | -24,787,847 |
Let's try dividing by 4:
24,787,847 ÷ 4 = 6,196,961.75
If the quotient is a whole number, then 4 and 6,196,961.75 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 | 24,787,847 | |
| -1 | 24,787,847 |
If you did it right, you will end up with this table:
| 1 | 7 | 47 | 59 | 329 | 413 | 1,277 | 2,773 | 8,939 | 19,411 | 60,019 | 75,343 | 420,133 | 527,401 | 3,541,121 | 24,787,847 |
| -1 | -7 | -47 | -59 | -329 | -413 | -1,277 | -2,773 | -8,939 | -19,411 | -60,019 | -75,343 | -420,133 | -527,401 | -3,541,121 | -24,787,847 |
Here are some more numbers to try:
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