A:
Positive:
1 x 284191255 x 56838257 x 405987525 x 113676535 x 811975125 x 227353175 x 162395875 x 32479
Negative:
-1 x -28419125-5 x -5683825-7 x -4059875-25 x -1136765-35 x -811975-125 x -227353-175 x -162395-875 x -32479
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 28,419,125, 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 | 28,419,125 | |
| -1 | -28,419,125 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 28,419,125.
Example:
1 x 28,419,125 = 28,419,125
and
-1 x -28,419,125 = 28,419,125
Notice both answers equal 28,419,125
With that explanation out of the way, let's continue. Next, we take the number 28,419,125 and divide it by 2:
28,419,125 ÷ 2 = 14,209,562.5
If the quotient is a whole number, then 2 and 14,209,562.5 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 | 28,419,125 | |
| -1 | -28,419,125 |
Now, we try dividing 28,419,125 by 3:
28,419,125 ÷ 3 = 9,473,041.6667
If the quotient is a whole number, then 3 and 9,473,041.6667 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 | 28,419,125 | |
| -1 | -28,419,125 |
Let's try dividing by 4:
28,419,125 ÷ 4 = 7,104,781.25
If the quotient is a whole number, then 4 and 7,104,781.25 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 | 28,419,125 | |
| -1 | 28,419,125 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 25 | 35 | 125 | 175 | 875 | 32,479 | 162,395 | 227,353 | 811,975 | 1,136,765 | 4,059,875 | 5,683,825 | 28,419,125 |
| -1 | -5 | -7 | -25 | -35 | -125 | -175 | -875 | -32,479 | -162,395 | -227,353 | -811,975 | -1,136,765 | -4,059,875 | -5,683,825 | -28,419,125 |
Here are some more numbers to try:
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