Q: What are the factor combinations of the number 142,130,155?

 A:
Positive:   1 x 1421301555 x 28426031353 x 4026351765 x 80527
Negative: -1 x -142130155-5 x -28426031-353 x -402635-1765 x -80527


How do I find the factor combinations of the number 142,130,155?

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 142,130,155, it is easier to work with a table - it's called factoring from the outside in.

Outside in Factoring

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.

1 142,130,155
-1 -142,130,155

Why are the negative numbers included?

When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 142,130,155.

Example:
1 x 142,130,155 = 142,130,155
and
-1 x -142,130,155 = 142,130,155
Notice both answers equal 142,130,155

With that explanation out of the way, let's continue. Next, we take the number 142,130,155 and divide it by 2:

142,130,155 ÷ 2 = 71,065,077.5

If the quotient is a whole number, then 2 and 71,065,077.5 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:

1 142,130,155
-1 -142,130,155

Now, we try dividing 142,130,155 by 3:

142,130,155 ÷ 3 = 47,376,718.3333

If the quotient is a whole number, then 3 and 47,376,718.3333 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:

1 142,130,155
-1 -142,130,155

Let's try dividing by 4:

142,130,155 ÷ 4 = 35,532,538.75

If the quotient is a whole number, then 4 and 35,532,538.75 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:

1 142,130,155
-1 142,130,155
Keep dividing by the next highest number until you cannot divide anymore.

If you did it right, you will end up with this table:

153531,76580,527402,63528,426,031142,130,155
-1-5-353-1,765-80,527-402,635-28,426,031-142,130,155

More Examples

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