A:
Positive:
1 x 124021455 x 24804297 x 177173535 x 35434749 x 253105223 x 55615227 x 54635245 x 506211115 x 111231135 x 109271561 x 79451589 x 7805
Negative:
-1 x -12402145-5 x -2480429-7 x -1771735-35 x -354347-49 x -253105-223 x -55615-227 x -54635-245 x -50621-1115 x -11123-1135 x -10927-1561 x -7945-1589 x -7805
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 12,402,145, 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 | 12,402,145 | |
| -1 | -12,402,145 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,402,145.
Example:
1 x 12,402,145 = 12,402,145
and
-1 x -12,402,145 = 12,402,145
Notice both answers equal 12,402,145
With that explanation out of the way, let's continue. Next, we take the number 12,402,145 and divide it by 2:
12,402,145 ÷ 2 = 6,201,072.5
If the quotient is a whole number, then 2 and 6,201,072.5 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 | 12,402,145 | |
| -1 | -12,402,145 |
Now, we try dividing 12,402,145 by 3:
12,402,145 ÷ 3 = 4,134,048.3333
If the quotient is a whole number, then 3 and 4,134,048.3333 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 | 12,402,145 | |
| -1 | -12,402,145 |
Let's try dividing by 4:
12,402,145 ÷ 4 = 3,100,536.25
If the quotient is a whole number, then 4 and 3,100,536.25 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 | 12,402,145 | |
| -1 | 12,402,145 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 49 | 223 | 227 | 245 | 1,115 | 1,135 | 1,561 | 1,589 | 7,805 | 7,945 | 10,927 | 11,123 | 50,621 | 54,635 | 55,615 | 253,105 | 354,347 | 1,771,735 | 2,480,429 | 12,402,145 |
| -1 | -5 | -7 | -35 | -49 | -223 | -227 | -245 | -1,115 | -1,135 | -1,561 | -1,589 | -7,805 | -7,945 | -10,927 | -11,123 | -50,621 | -54,635 | -55,615 | -253,105 | -354,347 | -1,771,735 | -2,480,429 | -12,402,145 |
Here are some more numbers to try:
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