A:
Positive:
1 x 72902055 x 145804113 x 56078519 x 38369565 x 11215795 x 76739247 x 295151235 x 5903
Negative:
-1 x -7290205-5 x -1458041-13 x -560785-19 x -383695-65 x -112157-95 x -76739-247 x -29515-1235 x -5903
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 7,290,205, 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 | 7,290,205 | |
| -1 | -7,290,205 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 7,290,205.
Example:
1 x 7,290,205 = 7,290,205
and
-1 x -7,290,205 = 7,290,205
Notice both answers equal 7,290,205
With that explanation out of the way, let's continue. Next, we take the number 7,290,205 and divide it by 2:
7,290,205 ÷ 2 = 3,645,102.5
If the quotient is a whole number, then 2 and 3,645,102.5 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 | 7,290,205 | |
| -1 | -7,290,205 |
Now, we try dividing 7,290,205 by 3:
7,290,205 ÷ 3 = 2,430,068.3333
If the quotient is a whole number, then 3 and 2,430,068.3333 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 | 7,290,205 | |
| -1 | -7,290,205 |
Let's try dividing by 4:
7,290,205 ÷ 4 = 1,822,551.25
If the quotient is a whole number, then 4 and 1,822,551.25 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 | 7,290,205 | |
| -1 | 7,290,205 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 19 | 65 | 95 | 247 | 1,235 | 5,903 | 29,515 | 76,739 | 112,157 | 383,695 | 560,785 | 1,458,041 | 7,290,205 |
| -1 | -5 | -13 | -19 | -65 | -95 | -247 | -1,235 | -5,903 | -29,515 | -76,739 | -112,157 | -383,695 | -560,785 | -1,458,041 | -7,290,205 |
Here are some more numbers to try:
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