A:
Positive:
1 x 122788455 x 245576917 x 72228519 x 64625585 x 14445795 x 129251323 x 380151615 x 7603
Negative:
-1 x -12278845-5 x -2455769-17 x -722285-19 x -646255-85 x -144457-95 x -129251-323 x -38015-1615 x -7603
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 12,278,845, 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 | 12,278,845 | |
| -1 | -12,278,845 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,278,845.
Example:
1 x 12,278,845 = 12,278,845
and
-1 x -12,278,845 = 12,278,845
Notice both answers equal 12,278,845
With that explanation out of the way, let's continue. Next, we take the number 12,278,845 and divide it by 2:
12,278,845 ÷ 2 = 6,139,422.5
If the quotient is a whole number, then 2 and 6,139,422.5 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 | 12,278,845 | |
| -1 | -12,278,845 |
Now, we try dividing 12,278,845 by 3:
12,278,845 ÷ 3 = 4,092,948.3333
If the quotient is a whole number, then 3 and 4,092,948.3333 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 | 12,278,845 | |
| -1 | -12,278,845 |
Let's try dividing by 4:
12,278,845 ÷ 4 = 3,069,711.25
If the quotient is a whole number, then 4 and 3,069,711.25 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 | 12,278,845 | |
| -1 | 12,278,845 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 19 | 85 | 95 | 323 | 1,615 | 7,603 | 38,015 | 129,251 | 144,457 | 646,255 | 722,285 | 2,455,769 | 12,278,845 |
| -1 | -5 | -17 | -19 | -85 | -95 | -323 | -1,615 | -7,603 | -38,015 | -129,251 | -144,457 | -646,255 | -722,285 | -2,455,769 | -12,278,845 |
Here are some more numbers to try:
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