Live GMAT classes with Target Test Prep start Nov 21 and Nov 22. First class free.

See classes
Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

Newsweek Readers’ Choice Awards 2026 winner: Target Test Prep, #1 Test Prep

Target Test Prep was voted #1 Best Test Prep in the 2026 Newsweek Readers’ Choice™ Awards.

★★★★★5.0563 reviews
GMATLiveTeachStarts Nov 22
Josh Braslow, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Josh Braslow, 20+ years in test prep

Nov 22 · Josh Braslow
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes + 6 months of TTP OnDemand
  • Attend the first class for free
  • Every class is recorded, so you never fall behind
View classes & enroll
Limited seats availableTarget Test Prep
EALiveTeachOnDemandStart anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

EXECUTIVE ASSESSMENT

with

165+ EA score guarantee
$05-day trial no automatic billing
Schedule
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll Start free 5-day trial
Limited cohort · enrollment openTrial includes full course accessTarget Test Prep
GMATOnDemandStart anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions
Start free 5-day trial
Read 563 reviewsTarget Test Prep

Can 1 and the number itself be counted as divisors?

Expert replies
Post new topic Post Reply
Subscribe topic
Previous Topic Next Topic
Newbie | Next Rank: 10 Posts
Posts: 2
Joined: Sun Oct 14, 2007 7:14 am
by sleepingfool » Thu Nov 08, 2007 2:32 am
20. If n and p are different positive prime numbers, which of the integers , and np has (have) exactly 4 positive divisors?
(A) n4 only
(B) p3 only
(C) np only
(D) n4 and np
(E) p3 and np

Answer is E

but Does it count 1 or the number itself as divisor?
If yes, then E wrong because
p3 has 1 p p2 p3 and np has n p => total is 6 divisors
Top
Join the discussion
Source: — Problem Solving |
User avatar
Legendary Member
Posts: 985
Joined: Wed Dec 20, 2006 11:07 amFollowed by: 1 member
Location: India
Thanked: 51 times

Re: Can 1 and the number itself be counted as divisors?

by gabriel » Thu Nov 08, 2007 6:19 am
sleepingfool wrote:20. If n and p are different positive prime numbers, which of the integers , and np has (have) exactly 4 positive divisors?
(A) n4 only
(B) p3 only
(C) np only
(D) n4 and np
(E) p3 and np

Answer is E

but Does it count 1 or the number itself as divisor?
If yes, then E wrong because
p3 has 1 p p2 p3 and np has n p => total is 6 divisors
I dont think the question is asking for the total number of divisors, it is simply asking for the number of divisors of each integer .. hence the answer E ..

Also, the number it self and 1 are considered as divisors when u calculate the total number of divisors for any integer ...
Top
Join the discussion
Junior | Next Rank: 30 Posts
Posts: 12
Joined: Fri Aug 31, 2007 10:03 am
Thanked: 2 times

by showoff16884 » Sun Nov 11, 2007 7:45 pm
Gabriel is right. The question is asking for the the divisors for each integer

P3 > 1, P1, P2 & P3
NP > 1, N, P & NP

4 divisors for each integer. Answer choice E
Top
Join the discussion