A:
Positive:
1 x 151562155 x 303124359 x 25688583 x 182605295 x 51377415 x 36521619 x 244853095 x 4897
Negative:
-1 x -15156215-5 x -3031243-59 x -256885-83 x -182605-295 x -51377-415 x -36521-619 x -24485-3095 x -4897
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 15,156,215, 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 | 15,156,215 | |
| -1 | -15,156,215 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,156,215.
Example:
1 x 15,156,215 = 15,156,215
and
-1 x -15,156,215 = 15,156,215
Notice both answers equal 15,156,215
With that explanation out of the way, let's continue. Next, we take the number 15,156,215 and divide it by 2:
15,156,215 ÷ 2 = 7,578,107.5
If the quotient is a whole number, then 2 and 7,578,107.5 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 | 15,156,215 | |
| -1 | -15,156,215 |
Now, we try dividing 15,156,215 by 3:
15,156,215 ÷ 3 = 5,052,071.6667
If the quotient is a whole number, then 3 and 5,052,071.6667 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 | 15,156,215 | |
| -1 | -15,156,215 |
Let's try dividing by 4:
15,156,215 ÷ 4 = 3,789,053.75
If the quotient is a whole number, then 4 and 3,789,053.75 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 | 15,156,215 | |
| -1 | 15,156,215 |
If you did it right, you will end up with this table:
| 1 | 5 | 59 | 83 | 295 | 415 | 619 | 3,095 | 4,897 | 24,485 | 36,521 | 51,377 | 182,605 | 256,885 | 3,031,243 | 15,156,215 |
| -1 | -5 | -59 | -83 | -295 | -415 | -619 | -3,095 | -4,897 | -24,485 | -36,521 | -51,377 | -182,605 | -256,885 | -3,031,243 | -15,156,215 |
Here are some more numbers to try:
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