A:
Positive:
1 x 152179455 x 304358973 x 208465173 x 87965241 x 63145365 x 41693865 x 175931205 x 12629
Negative:
-1 x -15217945-5 x -3043589-73 x -208465-173 x -87965-241 x -63145-365 x -41693-865 x -17593-1205 x -12629
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 15,217,945, 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 | 15,217,945 | |
| -1 | -15,217,945 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,217,945.
Example:
1 x 15,217,945 = 15,217,945
and
-1 x -15,217,945 = 15,217,945
Notice both answers equal 15,217,945
With that explanation out of the way, let's continue. Next, we take the number 15,217,945 and divide it by 2:
15,217,945 ÷ 2 = 7,608,972.5
If the quotient is a whole number, then 2 and 7,608,972.5 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 | 15,217,945 | |
| -1 | -15,217,945 |
Now, we try dividing 15,217,945 by 3:
15,217,945 ÷ 3 = 5,072,648.3333
If the quotient is a whole number, then 3 and 5,072,648.3333 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 | 15,217,945 | |
| -1 | -15,217,945 |
Let's try dividing by 4:
15,217,945 ÷ 4 = 3,804,486.25
If the quotient is a whole number, then 4 and 3,804,486.25 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 | 15,217,945 | |
| -1 | 15,217,945 |
If you did it right, you will end up with this table:
| 1 | 5 | 73 | 173 | 241 | 365 | 865 | 1,205 | 12,629 | 17,593 | 41,693 | 63,145 | 87,965 | 208,465 | 3,043,589 | 15,217,945 |
| -1 | -5 | -73 | -173 | -241 | -365 | -865 | -1,205 | -12,629 | -17,593 | -41,693 | -63,145 | -87,965 | -208,465 | -3,043,589 | -15,217,945 |
Here are some more numbers to try:
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