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# Divisors VS Factors

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Intern
Joined: 03 Mar 2009
Posts: 46
Divisors VS Factors  [#permalink]

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13 Apr 2009, 21:46
What's the difference between divisors and factors?

It seems like DIVISORS of X include 1 and X, but FACTORS don't.

Am I right?

It would help with questions like, "How many factors of Y are there?" or "Does Z have three positive factors?"

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Intern
Joined: 14 Apr 2009
Posts: 4
Re: Divisors VS Factors  [#permalink]

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14 Apr 2009, 11:51
This is my first post, please correct if there is any inconsistency:

Let's look at something for this "divisor" and "factor"

If x & y are integers and x != 0
then
x is a factor (divisor) of y
when y = xn (where n is some integer)

a little further
y/x is mean to be looked at as y is the dividend and x is a divisor

Hopefully this makes sense !
GMAT Tutor
Joined: 24 Jun 2008
Posts: 1323
Re: Divisors VS Factors  [#permalink]

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14 Apr 2009, 13:58
Nach0 wrote:
What's the difference between divisors and factors?

It seems like DIVISORS of X include 1 and X, but FACTORS don't.

Am I right?

It would help with questions like, "How many factors of Y are there?" or "Does Z have three positive factors?"

When discussing numbers, the words 'divisor' and 'factor' have the same meaning. '1' is a factor and a divisor of every positive integer.
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Manager
Joined: 14 Nov 2008
Posts: 174
Schools: Stanford...Wait, I will come!!!
Re: Divisors VS Factors  [#permalink]

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17 Apr 2009, 08:05
IanStewart wrote:
Nach0 wrote:
What's the difference between divisors and factors?

It seems like DIVISORS of X include 1 and X, but FACTORS don't.

Am I right?

It would help with questions like, "How many factors of Y are there?" or "Does Z have three positive factors?"

When discussing numbers, the words 'divisor' and 'factor' have the same meaning. '1' is a factor and a divisor of every positive integer.

Please correct me if I am wrong.

Divisor can/cannot completely divide the number.
But a factor will always divide it completely.

GMAT Tutor
Joined: 24 Jun 2008
Posts: 1323
Re: Divisors VS Factors  [#permalink]

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17 Apr 2009, 08:13
lgon wrote:

Please correct me if I am wrong.

Divisor can/cannot completely divide the number.
But a factor will always divide it completely.

No, that's not correct. Divisors must completely divide the number for which they are a divisor. Three is a divisor of six, for example, but not of seven. There wouldn't be much reason to have the term 'divisor' if divisors didn't need to divide completely; if that were true, then every positive integer would be a divisor of every other positive integer.
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Intern
Joined: 21 Apr 2009
Posts: 10
Location: DC
Re: Divisors VS Factors  [#permalink]

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21 Apr 2009, 15:25
1
Other responders have covered the main point: the words "divisor" and "factor" are completely interchangeable.

For example, the divisors of 12 are 1, 2, 3, 4, 6, and 12. The factors of 12 are... you guessed it. The exact same list.

Thus, you can make the observation that 1 is a factor/divisor of every number, and every number is a factor/divisor of itself.

Make sure not to confuse divisors with multiples! Multiples of 12 include 12, 24, 36, etc. That's right, every number is considered a multiple of itself.

Also, note the following list of facts:

The factors of 12 are 1, 2, 3, 4, 6, and 12.
The prime factorization of 12 is 12= 2*2*3.
12 has 6 factors (listed above).
The unique prime factors of 12 are only 2 and 3.

Hope this helps keep all of those things distinct!
Intern
Joined: 25 Mar 2009
Posts: 19
Re: Divisors VS Factors  [#permalink]

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05 May 2009, 05:15
Thanks Intern for the crisp explanation, it will really help.
Non-Human User
Joined: 09 Sep 2013
Posts: 9465
Re: Divisors VS Factors  [#permalink]

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20 Jan 2018, 05:40
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Re: Divisors VS Factors &nbs [#permalink] 20 Jan 2018, 05:40
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# Divisors VS Factors

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