A:
Positive:
1 x 1561637923 x 67897371 x 21994973 x 213923131 x 1192091633 x 95631679 x 93013013 x 5183
Negative:
-1 x -15616379-23 x -678973-71 x -219949-73 x -213923-131 x -119209-1633 x -9563-1679 x -9301-3013 x -5183
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 15,616,379, 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 | 15,616,379 | |
| -1 | -15,616,379 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,616,379.
Example:
1 x 15,616,379 = 15,616,379
and
-1 x -15,616,379 = 15,616,379
Notice both answers equal 15,616,379
With that explanation out of the way, let's continue. Next, we take the number 15,616,379 and divide it by 2:
15,616,379 ÷ 2 = 7,808,189.5
If the quotient is a whole number, then 2 and 7,808,189.5 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 | 15,616,379 | |
| -1 | -15,616,379 |
Now, we try dividing 15,616,379 by 3:
15,616,379 ÷ 3 = 5,205,459.6667
If the quotient is a whole number, then 3 and 5,205,459.6667 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 | 15,616,379 | |
| -1 | -15,616,379 |
Let's try dividing by 4:
15,616,379 ÷ 4 = 3,904,094.75
If the quotient is a whole number, then 4 and 3,904,094.75 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 | 15,616,379 | |
| -1 | 15,616,379 |
If you did it right, you will end up with this table:
| 1 | 23 | 71 | 73 | 131 | 1,633 | 1,679 | 3,013 | 5,183 | 9,301 | 9,563 | 119,209 | 213,923 | 219,949 | 678,973 | 15,616,379 |
| -1 | -23 | -71 | -73 | -131 | -1,633 | -1,679 | -3,013 | -5,183 | -9,301 | -9,563 | -119,209 | -213,923 | -219,949 | -678,973 | -15,616,379 |
Here are some more numbers to try:
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