A:
Positive:
1 x 18900255 x 37800519 x 9947523 x 8217525 x 7560195 x 19895115 x 16435173 x 10925437 x 4325475 x 3979575 x 3287865 x 2185
Negative:
-1 x -1890025-5 x -378005-19 x -99475-23 x -82175-25 x -75601-95 x -19895-115 x -16435-173 x -10925-437 x -4325-475 x -3979-575 x -3287-865 x -2185
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 1,890,025, 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 | 1,890,025 | |
| -1 | -1,890,025 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 1,890,025.
Example:
1 x 1,890,025 = 1,890,025
and
-1 x -1,890,025 = 1,890,025
Notice both answers equal 1,890,025
With that explanation out of the way, let's continue. Next, we take the number 1,890,025 and divide it by 2:
1,890,025 ÷ 2 = 945,012.5
If the quotient is a whole number, then 2 and 945,012.5 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 | 1,890,025 | |
| -1 | -1,890,025 |
Now, we try dividing 1,890,025 by 3:
1,890,025 ÷ 3 = 630,008.3333
If the quotient is a whole number, then 3 and 630,008.3333 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 | 1,890,025 | |
| -1 | -1,890,025 |
Let's try dividing by 4:
1,890,025 ÷ 4 = 472,506.25
If the quotient is a whole number, then 4 and 472,506.25 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 | 1,890,025 | |
| -1 | 1,890,025 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 23 | 25 | 95 | 115 | 173 | 437 | 475 | 575 | 865 | 2,185 | 3,287 | 3,979 | 4,325 | 10,925 | 16,435 | 19,895 | 75,601 | 82,175 | 99,475 | 378,005 | 1,890,025 |
| -1 | -5 | -19 | -23 | -25 | -95 | -115 | -173 | -437 | -475 | -575 | -865 | -2,185 | -3,287 | -3,979 | -4,325 | -10,925 | -16,435 | -19,895 | -75,601 | -82,175 | -99,475 | -378,005 | -1,890,025 |
Here are some more numbers to try:
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