A:
Positive:
1 x 151421277 x 216316111 x 137655713 x 116477949 x 30902377 x 19665191 x 166397143 x 105889539 x 28093637 x 237711001 x 151272161 x 7007
Negative:
-1 x -15142127-7 x -2163161-11 x -1376557-13 x -1164779-49 x -309023-77 x -196651-91 x -166397-143 x -105889-539 x -28093-637 x -23771-1001 x -15127-2161 x -7007
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 15,142,127, 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 | 15,142,127 | |
| -1 | -15,142,127 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,142,127.
Example:
1 x 15,142,127 = 15,142,127
and
-1 x -15,142,127 = 15,142,127
Notice both answers equal 15,142,127
With that explanation out of the way, let's continue. Next, we take the number 15,142,127 and divide it by 2:
15,142,127 ÷ 2 = 7,571,063.5
If the quotient is a whole number, then 2 and 7,571,063.5 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 | 15,142,127 | |
| -1 | -15,142,127 |
Now, we try dividing 15,142,127 by 3:
15,142,127 ÷ 3 = 5,047,375.6667
If the quotient is a whole number, then 3 and 5,047,375.6667 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 | 15,142,127 | |
| -1 | -15,142,127 |
Let's try dividing by 4:
15,142,127 ÷ 4 = 3,785,531.75
If the quotient is a whole number, then 4 and 3,785,531.75 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 | 15,142,127 | |
| -1 | 15,142,127 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 13 | 49 | 77 | 91 | 143 | 539 | 637 | 1,001 | 2,161 | 7,007 | 15,127 | 23,771 | 28,093 | 105,889 | 166,397 | 196,651 | 309,023 | 1,164,779 | 1,376,557 | 2,163,161 | 15,142,127 |
| -1 | -7 | -11 | -13 | -49 | -77 | -91 | -143 | -539 | -637 | -1,001 | -2,161 | -7,007 | -15,127 | -23,771 | -28,093 | -105,889 | -166,397 | -196,651 | -309,023 | -1,164,779 | -1,376,557 | -2,163,161 | -15,142,127 |
Here are some more numbers to try:
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