A:
Positive:
1 x 280477155 x 560954331 x 90476559 x 475385155 x 180953295 x 950771829 x 153353067 x 9145
Negative:
-1 x -28047715-5 x -5609543-31 x -904765-59 x -475385-155 x -180953-295 x -95077-1829 x -15335-3067 x -9145
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 28,047,715, 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 | 28,047,715 | |
| -1 | -28,047,715 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 28,047,715.
Example:
1 x 28,047,715 = 28,047,715
and
-1 x -28,047,715 = 28,047,715
Notice both answers equal 28,047,715
With that explanation out of the way, let's continue. Next, we take the number 28,047,715 and divide it by 2:
28,047,715 ÷ 2 = 14,023,857.5
If the quotient is a whole number, then 2 and 14,023,857.5 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 | 28,047,715 | |
| -1 | -28,047,715 |
Now, we try dividing 28,047,715 by 3:
28,047,715 ÷ 3 = 9,349,238.3333
If the quotient is a whole number, then 3 and 9,349,238.3333 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 | 28,047,715 | |
| -1 | -28,047,715 |
Let's try dividing by 4:
28,047,715 ÷ 4 = 7,011,928.75
If the quotient is a whole number, then 4 and 7,011,928.75 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 | 28,047,715 | |
| -1 | 28,047,715 |
If you did it right, you will end up with this table:
| 1 | 5 | 31 | 59 | 155 | 295 | 1,829 | 3,067 | 9,145 | 15,335 | 95,077 | 180,953 | 475,385 | 904,765 | 5,609,543 | 28,047,715 |
| -1 | -5 | -31 | -59 | -155 | -295 | -1,829 | -3,067 | -9,145 | -15,335 | -95,077 | -180,953 | -475,385 | -904,765 | -5,609,543 | -28,047,715 |
Here are some more numbers to try:
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