A:
Positive:
1 x 12815117 x 18307311 x 11650117 x 7538377 x 1664389 x 14399119 x 10769121 x 10591187 x 6853623 x 2057847 x 1513979 x 1309
Negative:
-1 x -1281511-7 x -183073-11 x -116501-17 x -75383-77 x -16643-89 x -14399-119 x -10769-121 x -10591-187 x -6853-623 x -2057-847 x -1513-979 x -1309
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 1,281,511, 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 | 1,281,511 | |
| -1 | -1,281,511 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 1,281,511.
Example:
1 x 1,281,511 = 1,281,511
and
-1 x -1,281,511 = 1,281,511
Notice both answers equal 1,281,511
With that explanation out of the way, let's continue. Next, we take the number 1,281,511 and divide it by 2:
1,281,511 ÷ 2 = 640,755.5
If the quotient is a whole number, then 2 and 640,755.5 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 | 1,281,511 | |
| -1 | -1,281,511 |
Now, we try dividing 1,281,511 by 3:
1,281,511 ÷ 3 = 427,170.3333
If the quotient is a whole number, then 3 and 427,170.3333 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 | 1,281,511 | |
| -1 | -1,281,511 |
Let's try dividing by 4:
1,281,511 ÷ 4 = 320,377.75
If the quotient is a whole number, then 4 and 320,377.75 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 | 1,281,511 | |
| -1 | 1,281,511 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 17 | 77 | 89 | 119 | 121 | 187 | 623 | 847 | 979 | 1,309 | 1,513 | 2,057 | 6,853 | 10,591 | 10,769 | 14,399 | 16,643 | 75,383 | 116,501 | 183,073 | 1,281,511 |
| -1 | -7 | -11 | -17 | -77 | -89 | -119 | -121 | -187 | -623 | -847 | -979 | -1,309 | -1,513 | -2,057 | -6,853 | -10,591 | -10,769 | -14,399 | -16,643 | -75,383 | -116,501 | -183,073 | -1,281,511 |
Here are some more numbers to try:
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