A:
Positive:
1 x 71375155 x 14275037 x 101964511 x 64886535 x 20392955 x 12977377 x 92695385 x 18539
Negative:
-1 x -7137515-5 x -1427503-7 x -1019645-11 x -648865-35 x -203929-55 x -129773-77 x -92695-385 x -18539
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 7,137,515, 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 | 7,137,515 | |
| -1 | -7,137,515 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 7,137,515.
Example:
1 x 7,137,515 = 7,137,515
and
-1 x -7,137,515 = 7,137,515
Notice both answers equal 7,137,515
With that explanation out of the way, let's continue. Next, we take the number 7,137,515 and divide it by 2:
7,137,515 ÷ 2 = 3,568,757.5
If the quotient is a whole number, then 2 and 3,568,757.5 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 | 7,137,515 | |
| -1 | -7,137,515 |
Now, we try dividing 7,137,515 by 3:
7,137,515 ÷ 3 = 2,379,171.6667
If the quotient is a whole number, then 3 and 2,379,171.6667 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 | 7,137,515 | |
| -1 | -7,137,515 |
Let's try dividing by 4:
7,137,515 ÷ 4 = 1,784,378.75
If the quotient is a whole number, then 4 and 1,784,378.75 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 | 7,137,515 | |
| -1 | 7,137,515 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 11 | 35 | 55 | 77 | 385 | 18,539 | 92,695 | 129,773 | 203,929 | 648,865 | 1,019,645 | 1,427,503 | 7,137,515 |
| -1 | -5 | -7 | -11 | -35 | -55 | -77 | -385 | -18,539 | -92,695 | -129,773 | -203,929 | -648,865 | -1,019,645 | -1,427,503 | -7,137,515 |
Here are some more numbers to try:
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