A:
Positive:
1 x 12874755 x 2574957 x 18392525 x 5149935 x 3678549 x 26275175 x 7357245 x 52551051 x 1225
Negative:
-1 x -1287475-5 x -257495-7 x -183925-25 x -51499-35 x -36785-49 x -26275-175 x -7357-245 x -5255-1051 x -1225
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 1,287,475, 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 | 1,287,475 | |
| -1 | -1,287,475 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 1,287,475.
Example:
1 x 1,287,475 = 1,287,475
and
-1 x -1,287,475 = 1,287,475
Notice both answers equal 1,287,475
With that explanation out of the way, let's continue. Next, we take the number 1,287,475 and divide it by 2:
1,287,475 ÷ 2 = 643,737.5
If the quotient is a whole number, then 2 and 643,737.5 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 | 1,287,475 | |
| -1 | -1,287,475 |
Now, we try dividing 1,287,475 by 3:
1,287,475 ÷ 3 = 429,158.3333
If the quotient is a whole number, then 3 and 429,158.3333 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 | 1,287,475 | |
| -1 | -1,287,475 |
Let's try dividing by 4:
1,287,475 ÷ 4 = 321,868.75
If the quotient is a whole number, then 4 and 321,868.75 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 | 1,287,475 | |
| -1 | 1,287,475 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 25 | 35 | 49 | 175 | 245 | 1,051 | 1,225 | 5,255 | 7,357 | 26,275 | 36,785 | 51,499 | 183,925 | 257,495 | 1,287,475 |
| -1 | -5 | -7 | -25 | -35 | -49 | -175 | -245 | -1,051 | -1,225 | -5,255 | -7,357 | -26,275 | -36,785 | -51,499 | -183,925 | -257,495 | -1,287,475 |
Here are some more numbers to try:
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