A:
Positive:
1 x 251437455 x 502874911 x 228579519 x 132335555 x 45715995 x 264671209 x 1203051045 x 24061
Negative:
-1 x -25143745-5 x -5028749-11 x -2285795-19 x -1323355-55 x -457159-95 x -264671-209 x -120305-1045 x -24061
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 25,143,745, 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 | 25,143,745 | |
| -1 | -25,143,745 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 25,143,745.
Example:
1 x 25,143,745 = 25,143,745
and
-1 x -25,143,745 = 25,143,745
Notice both answers equal 25,143,745
With that explanation out of the way, let's continue. Next, we take the number 25,143,745 and divide it by 2:
25,143,745 ÷ 2 = 12,571,872.5
If the quotient is a whole number, then 2 and 12,571,872.5 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 | 25,143,745 | |
| -1 | -25,143,745 |
Now, we try dividing 25,143,745 by 3:
25,143,745 ÷ 3 = 8,381,248.3333
If the quotient is a whole number, then 3 and 8,381,248.3333 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 | 25,143,745 | |
| -1 | -25,143,745 |
Let's try dividing by 4:
25,143,745 ÷ 4 = 6,285,936.25
If the quotient is a whole number, then 4 and 6,285,936.25 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 | 25,143,745 | |
| -1 | 25,143,745 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 19 | 55 | 95 | 209 | 1,045 | 24,061 | 120,305 | 264,671 | 457,159 | 1,323,355 | 2,285,795 | 5,028,749 | 25,143,745 |
| -1 | -5 | -11 | -19 | -55 | -95 | -209 | -1,045 | -24,061 | -120,305 | -264,671 | -457,159 | -1,323,355 | -2,285,795 | -5,028,749 | -25,143,745 |
Here are some more numbers to try:
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