A:
Positive:
1 x 1661026155 x 332205237 x 2372894535 x 4745789521 x 3188152605 x 637633647 x 455459109 x 18235
Negative:
-1 x -166102615-5 x -33220523-7 x -23728945-35 x -4745789-521 x -318815-2605 x -63763-3647 x -45545-9109 x -18235
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 166,102,615, 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 | 166,102,615 | |
| -1 | -166,102,615 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 166,102,615.
Example:
1 x 166,102,615 = 166,102,615
and
-1 x -166,102,615 = 166,102,615
Notice both answers equal 166,102,615
With that explanation out of the way, let's continue. Next, we take the number 166,102,615 and divide it by 2:
166,102,615 ÷ 2 = 83,051,307.5
If the quotient is a whole number, then 2 and 83,051,307.5 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 | 166,102,615 | |
| -1 | -166,102,615 |
Now, we try dividing 166,102,615 by 3:
166,102,615 ÷ 3 = 55,367,538.3333
If the quotient is a whole number, then 3 and 55,367,538.3333 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 | 166,102,615 | |
| -1 | -166,102,615 |
Let's try dividing by 4:
166,102,615 ÷ 4 = 41,525,653.75
If the quotient is a whole number, then 4 and 41,525,653.75 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 | 166,102,615 | |
| -1 | 166,102,615 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 521 | 2,605 | 3,647 | 9,109 | 18,235 | 45,545 | 63,763 | 318,815 | 4,745,789 | 23,728,945 | 33,220,523 | 166,102,615 |
| -1 | -5 | -7 | -35 | -521 | -2,605 | -3,647 | -9,109 | -18,235 | -45,545 | -63,763 | -318,815 | -4,745,789 | -23,728,945 | -33,220,523 | -166,102,615 |
Here are some more numbers to try:
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