A:
Positive:
1 x 130105155 x 26021037 x 185864535 x 371729127 x 102445635 x 20489889 x 146352927 x 4445
Negative:
-1 x -13010515-5 x -2602103-7 x -1858645-35 x -371729-127 x -102445-635 x -20489-889 x -14635-2927 x -4445
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 13,010,515, 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 | 13,010,515 | |
| -1 | -13,010,515 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 13,010,515.
Example:
1 x 13,010,515 = 13,010,515
and
-1 x -13,010,515 = 13,010,515
Notice both answers equal 13,010,515
With that explanation out of the way, let's continue. Next, we take the number 13,010,515 and divide it by 2:
13,010,515 ÷ 2 = 6,505,257.5
If the quotient is a whole number, then 2 and 6,505,257.5 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 | 13,010,515 | |
| -1 | -13,010,515 |
Now, we try dividing 13,010,515 by 3:
13,010,515 ÷ 3 = 4,336,838.3333
If the quotient is a whole number, then 3 and 4,336,838.3333 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 | 13,010,515 | |
| -1 | -13,010,515 |
Let's try dividing by 4:
13,010,515 ÷ 4 = 3,252,628.75
If the quotient is a whole number, then 4 and 3,252,628.75 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 | 13,010,515 | |
| -1 | 13,010,515 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 127 | 635 | 889 | 2,927 | 4,445 | 14,635 | 20,489 | 102,445 | 371,729 | 1,858,645 | 2,602,103 | 13,010,515 |
| -1 | -5 | -7 | -35 | -127 | -635 | -889 | -2,927 | -4,445 | -14,635 | -20,489 | -102,445 | -371,729 | -1,858,645 | -2,602,103 | -13,010,515 |
Here are some more numbers to try:
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