A:
Positive:
1 x 128613655 x 257227311 x 116921555 x 233843379 x 33935617 x 208451895 x 67873085 x 4169
Negative:
-1 x -12861365-5 x -2572273-11 x -1169215-55 x -233843-379 x -33935-617 x -20845-1895 x -6787-3085 x -4169
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 12,861,365, 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 | 12,861,365 | |
| -1 | -12,861,365 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,861,365.
Example:
1 x 12,861,365 = 12,861,365
and
-1 x -12,861,365 = 12,861,365
Notice both answers equal 12,861,365
With that explanation out of the way, let's continue. Next, we take the number 12,861,365 and divide it by 2:
12,861,365 ÷ 2 = 6,430,682.5
If the quotient is a whole number, then 2 and 6,430,682.5 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 | 12,861,365 | |
| -1 | -12,861,365 |
Now, we try dividing 12,861,365 by 3:
12,861,365 ÷ 3 = 4,287,121.6667
If the quotient is a whole number, then 3 and 4,287,121.6667 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 | 12,861,365 | |
| -1 | -12,861,365 |
Let's try dividing by 4:
12,861,365 ÷ 4 = 3,215,341.25
If the quotient is a whole number, then 4 and 3,215,341.25 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 | 12,861,365 | |
| -1 | 12,861,365 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 379 | 617 | 1,895 | 3,085 | 4,169 | 6,787 | 20,845 | 33,935 | 233,843 | 1,169,215 | 2,572,273 | 12,861,365 |
| -1 | -5 | -11 | -55 | -379 | -617 | -1,895 | -3,085 | -4,169 | -6,787 | -20,845 | -33,935 | -233,843 | -1,169,215 | -2,572,273 | -12,861,365 |
Here are some more numbers to try:
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