A:
Positive:
1 x 74015155 x 148030311 x 67286523 x 32180555 x 134573115 x 64361253 x 292551265 x 5851
Negative:
-1 x -7401515-5 x -1480303-11 x -672865-23 x -321805-55 x -134573-115 x -64361-253 x -29255-1265 x -5851
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 7,401,515, 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 | 7,401,515 | |
| -1 | -7,401,515 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 7,401,515.
Example:
1 x 7,401,515 = 7,401,515
and
-1 x -7,401,515 = 7,401,515
Notice both answers equal 7,401,515
With that explanation out of the way, let's continue. Next, we take the number 7,401,515 and divide it by 2:
7,401,515 ÷ 2 = 3,700,757.5
If the quotient is a whole number, then 2 and 3,700,757.5 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 | 7,401,515 | |
| -1 | -7,401,515 |
Now, we try dividing 7,401,515 by 3:
7,401,515 ÷ 3 = 2,467,171.6667
If the quotient is a whole number, then 3 and 2,467,171.6667 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 | 7,401,515 | |
| -1 | -7,401,515 |
Let's try dividing by 4:
7,401,515 ÷ 4 = 1,850,378.75
If the quotient is a whole number, then 4 and 1,850,378.75 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 | 7,401,515 | |
| -1 | 7,401,515 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 23 | 55 | 115 | 253 | 1,265 | 5,851 | 29,255 | 64,361 | 134,573 | 321,805 | 672,865 | 1,480,303 | 7,401,515 |
| -1 | -5 | -11 | -23 | -55 | -115 | -253 | -1,265 | -5,851 | -29,255 | -64,361 | -134,573 | -321,805 | -672,865 | -1,480,303 | -7,401,515 |
Here are some more numbers to try:
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