A:
Positive:
1 x 288735055 x 577470137 x 78036597 x 297665185 x 156073485 x 595331609 x 179453589 x 8045
Negative:
-1 x -28873505-5 x -5774701-37 x -780365-97 x -297665-185 x -156073-485 x -59533-1609 x -17945-3589 x -8045
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 28,873,505, 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 | 28,873,505 | |
| -1 | -28,873,505 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 28,873,505.
Example:
1 x 28,873,505 = 28,873,505
and
-1 x -28,873,505 = 28,873,505
Notice both answers equal 28,873,505
With that explanation out of the way, let's continue. Next, we take the number 28,873,505 and divide it by 2:
28,873,505 ÷ 2 = 14,436,752.5
If the quotient is a whole number, then 2 and 14,436,752.5 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 | 28,873,505 | |
| -1 | -28,873,505 |
Now, we try dividing 28,873,505 by 3:
28,873,505 ÷ 3 = 9,624,501.6667
If the quotient is a whole number, then 3 and 9,624,501.6667 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 | 28,873,505 | |
| -1 | -28,873,505 |
Let's try dividing by 4:
28,873,505 ÷ 4 = 7,218,376.25
If the quotient is a whole number, then 4 and 7,218,376.25 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 | 28,873,505 | |
| -1 | 28,873,505 |
If you did it right, you will end up with this table:
| 1 | 5 | 37 | 97 | 185 | 485 | 1,609 | 3,589 | 8,045 | 17,945 | 59,533 | 156,073 | 297,665 | 780,365 | 5,774,701 | 28,873,505 |
| -1 | -5 | -37 | -97 | -185 | -485 | -1,609 | -3,589 | -8,045 | -17,945 | -59,533 | -156,073 | -297,665 | -780,365 | -5,774,701 | -28,873,505 |
Here are some more numbers to try:
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