A:
Positive:
1 x 20386455 x 4077297 x 29123535 x 5824749 x 4160553 x 38465157 x 12985245 x 8321265 x 7693371 x 5495785 x 25971099 x 1855
Negative:
-1 x -2038645-5 x -407729-7 x -291235-35 x -58247-49 x -41605-53 x -38465-157 x -12985-245 x -8321-265 x -7693-371 x -5495-785 x -2597-1099 x -1855
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 2,038,645, 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 | 2,038,645 | |
| -1 | -2,038,645 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 2,038,645.
Example:
1 x 2,038,645 = 2,038,645
and
-1 x -2,038,645 = 2,038,645
Notice both answers equal 2,038,645
With that explanation out of the way, let's continue. Next, we take the number 2,038,645 and divide it by 2:
2,038,645 ÷ 2 = 1,019,322.5
If the quotient is a whole number, then 2 and 1,019,322.5 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 | 2,038,645 | |
| -1 | -2,038,645 |
Now, we try dividing 2,038,645 by 3:
2,038,645 ÷ 3 = 679,548.3333
If the quotient is a whole number, then 3 and 679,548.3333 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 | 2,038,645 | |
| -1 | -2,038,645 |
Let's try dividing by 4:
2,038,645 ÷ 4 = 509,661.25
If the quotient is a whole number, then 4 and 509,661.25 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 | 2,038,645 | |
| -1 | 2,038,645 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 49 | 53 | 157 | 245 | 265 | 371 | 785 | 1,099 | 1,855 | 2,597 | 5,495 | 7,693 | 8,321 | 12,985 | 38,465 | 41,605 | 58,247 | 291,235 | 407,729 | 2,038,645 |
| -1 | -5 | -7 | -35 | -49 | -53 | -157 | -245 | -265 | -371 | -785 | -1,099 | -1,855 | -2,597 | -5,495 | -7,693 | -8,321 | -12,985 | -38,465 | -41,605 | -58,247 | -291,235 | -407,729 | -2,038,645 |
Here are some more numbers to try:
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