A:
Positive:
1 x 1511651911 x 137422917 x 889207187 x 80837229 x 66011353 x 428232519 x 60013883 x 3893
Negative:
-1 x -15116519-11 x -1374229-17 x -889207-187 x -80837-229 x -66011-353 x -42823-2519 x -6001-3883 x -3893
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 15,116,519, 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 | 15,116,519 | |
| -1 | -15,116,519 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,116,519.
Example:
1 x 15,116,519 = 15,116,519
and
-1 x -15,116,519 = 15,116,519
Notice both answers equal 15,116,519
With that explanation out of the way, let's continue. Next, we take the number 15,116,519 and divide it by 2:
15,116,519 ÷ 2 = 7,558,259.5
If the quotient is a whole number, then 2 and 7,558,259.5 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 | 15,116,519 | |
| -1 | -15,116,519 |
Now, we try dividing 15,116,519 by 3:
15,116,519 ÷ 3 = 5,038,839.6667
If the quotient is a whole number, then 3 and 5,038,839.6667 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 | 15,116,519 | |
| -1 | -15,116,519 |
Let's try dividing by 4:
15,116,519 ÷ 4 = 3,779,129.75
If the quotient is a whole number, then 4 and 3,779,129.75 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 | 15,116,519 | |
| -1 | 15,116,519 |
If you did it right, you will end up with this table:
| 1 | 11 | 17 | 187 | 229 | 353 | 2,519 | 3,883 | 3,893 | 6,001 | 42,823 | 66,011 | 80,837 | 889,207 | 1,374,229 | 15,116,519 |
| -1 | -11 | -17 | -187 | -229 | -353 | -2,519 | -3,883 | -3,893 | -6,001 | -42,823 | -66,011 | -80,837 | -889,207 | -1,374,229 | -15,116,519 |
Here are some more numbers to try:
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