A:
Positive:
1 x 283408517 x 404869311 x 257644131 x 91422177 x 368063217 x 130603341 x 83111383 x 73997961 x 294912387 x 118732681 x 105714213 x 6727
Negative:
-1 x -28340851-7 x -4048693-11 x -2576441-31 x -914221-77 x -368063-217 x -130603-341 x -83111-383 x -73997-961 x -29491-2387 x -11873-2681 x -10571-4213 x -6727
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 28,340,851, 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 | 28,340,851 | |
| -1 | -28,340,851 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 28,340,851.
Example:
1 x 28,340,851 = 28,340,851
and
-1 x -28,340,851 = 28,340,851
Notice both answers equal 28,340,851
With that explanation out of the way, let's continue. Next, we take the number 28,340,851 and divide it by 2:
28,340,851 ÷ 2 = 14,170,425.5
If the quotient is a whole number, then 2 and 14,170,425.5 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 | 28,340,851 | |
| -1 | -28,340,851 |
Now, we try dividing 28,340,851 by 3:
28,340,851 ÷ 3 = 9,446,950.3333
If the quotient is a whole number, then 3 and 9,446,950.3333 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 | 28,340,851 | |
| -1 | -28,340,851 |
Let's try dividing by 4:
28,340,851 ÷ 4 = 7,085,212.75
If the quotient is a whole number, then 4 and 7,085,212.75 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 | 28,340,851 | |
| -1 | 28,340,851 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 31 | 77 | 217 | 341 | 383 | 961 | 2,387 | 2,681 | 4,213 | 6,727 | 10,571 | 11,873 | 29,491 | 73,997 | 83,111 | 130,603 | 368,063 | 914,221 | 2,576,441 | 4,048,693 | 28,340,851 |
| -1 | -7 | -11 | -31 | -77 | -217 | -341 | -383 | -961 | -2,387 | -2,681 | -4,213 | -6,727 | -10,571 | -11,873 | -29,491 | -73,997 | -83,111 | -130,603 | -368,063 | -914,221 | -2,576,441 | -4,048,693 | -28,340,851 |
Here are some more numbers to try:
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