A:
Positive:
1 x 155311155 x 310622317 x 91359573 x 21275585 x 182719365 x 425511241 x 125152503 x 6205
Negative:
-1 x -15531115-5 x -3106223-17 x -913595-73 x -212755-85 x -182719-365 x -42551-1241 x -12515-2503 x -6205
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 15,531,115, 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 | 15,531,115 | |
| -1 | -15,531,115 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,531,115.
Example:
1 x 15,531,115 = 15,531,115
and
-1 x -15,531,115 = 15,531,115
Notice both answers equal 15,531,115
With that explanation out of the way, let's continue. Next, we take the number 15,531,115 and divide it by 2:
15,531,115 ÷ 2 = 7,765,557.5
If the quotient is a whole number, then 2 and 7,765,557.5 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 | 15,531,115 | |
| -1 | -15,531,115 |
Now, we try dividing 15,531,115 by 3:
15,531,115 ÷ 3 = 5,177,038.3333
If the quotient is a whole number, then 3 and 5,177,038.3333 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 | 15,531,115 | |
| -1 | -15,531,115 |
Let's try dividing by 4:
15,531,115 ÷ 4 = 3,882,778.75
If the quotient is a whole number, then 4 and 3,882,778.75 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 | 15,531,115 | |
| -1 | 15,531,115 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 73 | 85 | 365 | 1,241 | 2,503 | 6,205 | 12,515 | 42,551 | 182,719 | 212,755 | 913,595 | 3,106,223 | 15,531,115 |
| -1 | -5 | -17 | -73 | -85 | -365 | -1,241 | -2,503 | -6,205 | -12,515 | -42,551 | -182,719 | -212,755 | -913,595 | -3,106,223 | -15,531,115 |
Here are some more numbers to try:
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