A:
Positive:
1 x 12198555 x 2439717 x 17426513 x 9383535 x 3485349 x 2489565 x 1876791 x 13405245 x 4979383 x 3185455 x 2681637 x 1915
Negative:
-1 x -1219855-5 x -243971-7 x -174265-13 x -93835-35 x -34853-49 x -24895-65 x -18767-91 x -13405-245 x -4979-383 x -3185-455 x -2681-637 x -1915
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 1,219,855, 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 | 1,219,855 | |
| -1 | -1,219,855 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 1,219,855.
Example:
1 x 1,219,855 = 1,219,855
and
-1 x -1,219,855 = 1,219,855
Notice both answers equal 1,219,855
With that explanation out of the way, let's continue. Next, we take the number 1,219,855 and divide it by 2:
1,219,855 ÷ 2 = 609,927.5
If the quotient is a whole number, then 2 and 609,927.5 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 | 1,219,855 | |
| -1 | -1,219,855 |
Now, we try dividing 1,219,855 by 3:
1,219,855 ÷ 3 = 406,618.3333
If the quotient is a whole number, then 3 and 406,618.3333 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 | 1,219,855 | |
| -1 | -1,219,855 |
Let's try dividing by 4:
1,219,855 ÷ 4 = 304,963.75
If the quotient is a whole number, then 4 and 304,963.75 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 | 1,219,855 | |
| -1 | 1,219,855 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 13 | 35 | 49 | 65 | 91 | 245 | 383 | 455 | 637 | 1,915 | 2,681 | 3,185 | 4,979 | 13,405 | 18,767 | 24,895 | 34,853 | 93,835 | 174,265 | 243,971 | 1,219,855 |
| -1 | -5 | -7 | -13 | -35 | -49 | -65 | -91 | -245 | -383 | -455 | -637 | -1,915 | -2,681 | -3,185 | -4,979 | -13,405 | -18,767 | -24,895 | -34,853 | -93,835 | -174,265 | -243,971 | -1,219,855 |
Here are some more numbers to try:
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