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# Prime Factorisation and Combinatorics

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Senior Manager
Joined: 12 May 2010
Posts: 288
Location: United Kingdom
Concentration: Entrepreneurship, Technology
GMAT Date: 10-22-2011
GPA: 3
WE: Information Technology (Internet and New Media)
Followers: 4

Kudos [?]: 52 [0], given: 12

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03 Oct 2010, 07:50
Hi all,

From MGMAT: Factors of a number can be found by building all the possible products of the prime factors...

It seems to me that this lends itself to using combinatorics to calculate the NUMBER of possible factors of a number… You would find the prime factors then find all the different combinations of the prime factors? Can someone please confirm this is correct?

Thanks
Retired Moderator
Joined: 02 Sep 2010
Posts: 805
Location: London
Followers: 100

Kudos [?]: 853 [0], given: 25

Re: Prime Factorisation and Combinatorics [#permalink]

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03 Oct 2010, 11:40
n2739178 wrote:
Hi all,

From MGMAT: Factors of a number can be found by building all the possible products of the prime factors...

It seems to me that this lends itself to using combinatorics to calculate the NUMBER of possible factors of a number… You would find the prime factors then find all the different combinations of the prime factors? Can someone please confirm this is correct?

Thanks

Yes, you are correct

I have explained here how you may do this, and derived the formula for it in general using combinatorics.
_________________
Senior Manager
Joined: 12 May 2010
Posts: 288
Location: United Kingdom
Concentration: Entrepreneurship, Technology
GMAT Date: 10-22-2011
GPA: 3
WE: Information Technology (Internet and New Media)
Followers: 4

Kudos [?]: 52 [0], given: 12

Re: Prime Factorisation and Combinatorics [#permalink]

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03 Oct 2010, 11:55
Fantastic - thanks heaps!

I see you live in London - I do as well. Are you attending LBS or have attended it by any chance?

Thanks.
Retired Moderator
Joined: 02 Sep 2010
Posts: 805
Location: London
Followers: 100

Kudos [?]: 853 [0], given: 25

Re: Prime Factorisation and Combinatorics [#permalink]

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03 Oct 2010, 11:58
fellow Londoner !
i work here ... i have flirted with the idea of going to school this year, but don't think I am applying yet
_________________
Senior Manager
Joined: 12 May 2010
Posts: 288
Location: United Kingdom
Concentration: Entrepreneurship, Technology
GMAT Date: 10-22-2011
GPA: 3
WE: Information Technology (Internet and New Media)
Followers: 4

Kudos [?]: 52 [0], given: 12

Re: Prime Factorisation and Combinatorics [#permalink]

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06 Oct 2010, 15:14
shrouded1: with a GMAT of 760, you'd be straight into LBS surely?!

Still have to take my GMAT... completely lost on what strategy i should take for studying.
Retired Moderator
Joined: 02 Sep 2010
Posts: 805
Location: London
Followers: 100

Kudos [?]: 853 [0], given: 25

Re: Prime Factorisation and Combinatorics [#permalink]

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06 Oct 2010, 15:19
I have bigger demons to slay

I already have a job that most MBAs look to get post degree ... This summer if it wasnt for some unforseen plans, I was supposed to be one of the intern mentors (which included MBAs, my team had someone from INSEAD I think) !

So for me the task really is to have a new goal in mind if I want to do an MBA ... when I want to leave finance I'll probably go for the MBA, within this field, the degree is not a value add for me. Plus the opportunity cost of lost income is very high as well.
_________________
Senior Manager
Joined: 12 May 2010
Posts: 288
Location: United Kingdom
Concentration: Entrepreneurship, Technology
GMAT Date: 10-22-2011
GPA: 3
WE: Information Technology (Internet and New Media)
Followers: 4

Kudos [?]: 52 [0], given: 12

Re: Prime Factorisation and Combinatorics [#permalink]

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25 Oct 2010, 12:40
Fair enough then - if you're already in finance etc. and slaying the £££'s then maybe no point doing an MBA!

best of luck
Re: Prime Factorisation and Combinatorics   [#permalink] 25 Oct 2010, 12:40
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