A:
Positive:
1 x 13886155 x 27772319 x 7308547 x 2954595 x 14617235 x 5909311 x 4465893 x 1555
Negative:
-1 x -1388615-5 x -277723-19 x -73085-47 x -29545-95 x -14617-235 x -5909-311 x -4465-893 x -1555
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 1,388,615, 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 | 1,388,615 | |
| -1 | -1,388,615 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 1,388,615.
Example:
1 x 1,388,615 = 1,388,615
and
-1 x -1,388,615 = 1,388,615
Notice both answers equal 1,388,615
With that explanation out of the way, let's continue. Next, we take the number 1,388,615 and divide it by 2:
1,388,615 ÷ 2 = 694,307.5
If the quotient is a whole number, then 2 and 694,307.5 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 | 1,388,615 | |
| -1 | -1,388,615 |
Now, we try dividing 1,388,615 by 3:
1,388,615 ÷ 3 = 462,871.6667
If the quotient is a whole number, then 3 and 462,871.6667 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 | 1,388,615 | |
| -1 | -1,388,615 |
Let's try dividing by 4:
1,388,615 ÷ 4 = 347,153.75
If the quotient is a whole number, then 4 and 347,153.75 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 | 1,388,615 | |
| -1 | 1,388,615 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 47 | 95 | 235 | 311 | 893 | 1,555 | 4,465 | 5,909 | 14,617 | 29,545 | 73,085 | 277,723 | 1,388,615 |
| -1 | -5 | -19 | -47 | -95 | -235 | -311 | -893 | -1,555 | -4,465 | -5,909 | -14,617 | -29,545 | -73,085 | -277,723 | -1,388,615 |
Here are some more numbers to try:
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