A:
Positive:
1 x 12578155 x 25156313 x 9675537 x 3399565 x 19351185 x 6799481 x 2615523 x 2405
Negative:
-1 x -1257815-5 x -251563-13 x -96755-37 x -33995-65 x -19351-185 x -6799-481 x -2615-523 x -2405
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 1,257,815, 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 | 1,257,815 | |
| -1 | -1,257,815 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 1,257,815.
Example:
1 x 1,257,815 = 1,257,815
and
-1 x -1,257,815 = 1,257,815
Notice both answers equal 1,257,815
With that explanation out of the way, let's continue. Next, we take the number 1,257,815 and divide it by 2:
1,257,815 ÷ 2 = 628,907.5
If the quotient is a whole number, then 2 and 628,907.5 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 | 1,257,815 | |
| -1 | -1,257,815 |
Now, we try dividing 1,257,815 by 3:
1,257,815 ÷ 3 = 419,271.6667
If the quotient is a whole number, then 3 and 419,271.6667 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 | 1,257,815 | |
| -1 | -1,257,815 |
Let's try dividing by 4:
1,257,815 ÷ 4 = 314,453.75
If the quotient is a whole number, then 4 and 314,453.75 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 | 1,257,815 | |
| -1 | 1,257,815 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 37 | 65 | 185 | 481 | 523 | 2,405 | 2,615 | 6,799 | 19,351 | 33,995 | 96,755 | 251,563 | 1,257,815 |
| -1 | -5 | -13 | -37 | -65 | -185 | -481 | -523 | -2,405 | -2,615 | -6,799 | -19,351 | -33,995 | -96,755 | -251,563 | -1,257,815 |
Here are some more numbers to try:
Try the factor calculator