Number (or sum) of divisors from the prime factorisation
This type of question, asked 8 times: CDS 2 2018, CDS 2 2020, CDS 1 2022, CDS 2 2022, CDS 1 2023, CDS 2 2024, CDS 1 2025, CDS 1 2026. All 8 questions below, oldest first.
Try each one first, then open its answer.
Question 1
CDS 2 2018
7The number of divisors of the number 38808, exclusive of the divisors 1 and itself, isTap an option to check your answer.
Question 2
CDS 2 2020
19Let denote the number of positive divisors of a positive integer . Which of the following are correct ? 1. 2. 3. Select the correct answer using the code given below :Tap an option to check your answer.
Question 3
CDS 1 2022
35What is the number of divisors of 1000 (excluding 1 and 1000)?Tap an option to check your answer.
Question 4
CDS 2 2022
21Consider the number . Which of the following statements is/are correct ? 1. The number of odd factors of N is 60. 2. The number of even factors of N is 720. Select the correct answer using the code given below :Tap an option to check your answer.
Question 5
CDS 1 2023
22Consider the following statements in respect of all factors of 360 : 1. The number of factors is 24. 2. The sum of all factors is 1170. Which of the above statements is/are correct?Tap an option to check your answer.
Question 6
CDS 2 2024
31A 4-digit number has exactly 15 distinct divisors. What is the total number of distinct divisors of ?Tap an option to check your answer.
Question 7
CDS 1 2025
48What is the number of factors of ?Tap an option to check your answer.
Question 8
CDS 1 2026
27What is the sum of all the divisors of 256 ?Tap an option to check your answer.