A:
Positive:
1 x 1510219113 x 116170723 x 65661753 x 284947299 x 50509689 x 21919953 x 158471219 x 12389
Negative:
-1 x -15102191-13 x -1161707-23 x -656617-53 x -284947-299 x -50509-689 x -21919-953 x -15847-1219 x -12389
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 15,102,191, 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 | 15,102,191 | |
| -1 | -15,102,191 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,102,191.
Example:
1 x 15,102,191 = 15,102,191
and
-1 x -15,102,191 = 15,102,191
Notice both answers equal 15,102,191
With that explanation out of the way, let's continue. Next, we take the number 15,102,191 and divide it by 2:
15,102,191 ÷ 2 = 7,551,095.5
If the quotient is a whole number, then 2 and 7,551,095.5 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 | 15,102,191 | |
| -1 | -15,102,191 |
Now, we try dividing 15,102,191 by 3:
15,102,191 ÷ 3 = 5,034,063.6667
If the quotient is a whole number, then 3 and 5,034,063.6667 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 | 15,102,191 | |
| -1 | -15,102,191 |
Let's try dividing by 4:
15,102,191 ÷ 4 = 3,775,547.75
If the quotient is a whole number, then 4 and 3,775,547.75 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 | 15,102,191 | |
| -1 | 15,102,191 |
If you did it right, you will end up with this table:
| 1 | 13 | 23 | 53 | 299 | 689 | 953 | 1,219 | 12,389 | 15,847 | 21,919 | 50,509 | 284,947 | 656,617 | 1,161,707 | 15,102,191 |
| -1 | -13 | -23 | -53 | -299 | -689 | -953 | -1,219 | -12,389 | -15,847 | -21,919 | -50,509 | -284,947 | -656,617 | -1,161,707 | -15,102,191 |
Here are some more numbers to try:
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