A:
Positive:
1 x 1253925117 x 73760367 x 187153101 x 124151109 x 1150391139 x 110091717 x 73031853 x 6767
Negative:
-1 x -12539251-17 x -737603-67 x -187153-101 x -124151-109 x -115039-1139 x -11009-1717 x -7303-1853 x -6767
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 12,539,251, 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 | 12,539,251 | |
| -1 | -12,539,251 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,539,251.
Example:
1 x 12,539,251 = 12,539,251
and
-1 x -12,539,251 = 12,539,251
Notice both answers equal 12,539,251
With that explanation out of the way, let's continue. Next, we take the number 12,539,251 and divide it by 2:
12,539,251 ÷ 2 = 6,269,625.5
If the quotient is a whole number, then 2 and 6,269,625.5 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 | 12,539,251 | |
| -1 | -12,539,251 |
Now, we try dividing 12,539,251 by 3:
12,539,251 ÷ 3 = 4,179,750.3333
If the quotient is a whole number, then 3 and 4,179,750.3333 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 | 12,539,251 | |
| -1 | -12,539,251 |
Let's try dividing by 4:
12,539,251 ÷ 4 = 3,134,812.75
If the quotient is a whole number, then 4 and 3,134,812.75 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 | 12,539,251 | |
| -1 | 12,539,251 |
If you did it right, you will end up with this table:
| 1 | 17 | 67 | 101 | 109 | 1,139 | 1,717 | 1,853 | 6,767 | 7,303 | 11,009 | 115,039 | 124,151 | 187,153 | 737,603 | 12,539,251 |
| -1 | -17 | -67 | -101 | -109 | -1,139 | -1,717 | -1,853 | -6,767 | -7,303 | -11,009 | -115,039 | -124,151 | -187,153 | -737,603 | -12,539,251 |
Here are some more numbers to try:
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