A:
Positive:
1 x 120515155 x 24103037 x 172164535 x 344329103 x 117005515 x 23401721 x 167153343 x 3605
Negative:
-1 x -12051515-5 x -2410303-7 x -1721645-35 x -344329-103 x -117005-515 x -23401-721 x -16715-3343 x -3605
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 12,051,515, 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 | 12,051,515 | |
| -1 | -12,051,515 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,051,515.
Example:
1 x 12,051,515 = 12,051,515
and
-1 x -12,051,515 = 12,051,515
Notice both answers equal 12,051,515
With that explanation out of the way, let's continue. Next, we take the number 12,051,515 and divide it by 2:
12,051,515 ÷ 2 = 6,025,757.5
If the quotient is a whole number, then 2 and 6,025,757.5 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 | 12,051,515 | |
| -1 | -12,051,515 |
Now, we try dividing 12,051,515 by 3:
12,051,515 ÷ 3 = 4,017,171.6667
If the quotient is a whole number, then 3 and 4,017,171.6667 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 | 12,051,515 | |
| -1 | -12,051,515 |
Let's try dividing by 4:
12,051,515 ÷ 4 = 3,012,878.75
If the quotient is a whole number, then 4 and 3,012,878.75 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 | 12,051,515 | |
| -1 | 12,051,515 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 103 | 515 | 721 | 3,343 | 3,605 | 16,715 | 23,401 | 117,005 | 344,329 | 1,721,645 | 2,410,303 | 12,051,515 |
| -1 | -5 | -7 | -35 | -103 | -515 | -721 | -3,343 | -3,605 | -16,715 | -23,401 | -117,005 | -344,329 | -1,721,645 | -2,410,303 | -12,051,515 |
Here are some more numbers to try:
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