A:
Positive:
1 x 153406155 x 306812371 x 21606579 x 194185355 x 43213395 x 38837547 x 280452735 x 5609
Negative:
-1 x -15340615-5 x -3068123-71 x -216065-79 x -194185-355 x -43213-395 x -38837-547 x -28045-2735 x -5609
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 15,340,615, 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 | 15,340,615 | |
| -1 | -15,340,615 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,340,615.
Example:
1 x 15,340,615 = 15,340,615
and
-1 x -15,340,615 = 15,340,615
Notice both answers equal 15,340,615
With that explanation out of the way, let's continue. Next, we take the number 15,340,615 and divide it by 2:
15,340,615 ÷ 2 = 7,670,307.5
If the quotient is a whole number, then 2 and 7,670,307.5 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 | 15,340,615 | |
| -1 | -15,340,615 |
Now, we try dividing 15,340,615 by 3:
15,340,615 ÷ 3 = 5,113,538.3333
If the quotient is a whole number, then 3 and 5,113,538.3333 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 | 15,340,615 | |
| -1 | -15,340,615 |
Let's try dividing by 4:
15,340,615 ÷ 4 = 3,835,153.75
If the quotient is a whole number, then 4 and 3,835,153.75 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 | 15,340,615 | |
| -1 | 15,340,615 |
If you did it right, you will end up with this table:
| 1 | 5 | 71 | 79 | 355 | 395 | 547 | 2,735 | 5,609 | 28,045 | 38,837 | 43,213 | 194,185 | 216,065 | 3,068,123 | 15,340,615 |
| -1 | -5 | -71 | -79 | -355 | -395 | -547 | -2,735 | -5,609 | -28,045 | -38,837 | -43,213 | -194,185 | -216,065 | -3,068,123 | -15,340,615 |
Here are some more numbers to try:
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