Mathematics · Number Theory
Where σ(n) denotes the sum-of-divisors function, which statement is true for co-prime integers p and q?
- 1σ(pq) = σ(p) + σ(q)
- 2σ(pq) = σ(p)q
- 3σ(pq) = σ(p)σ(q)✓
- 4σ(pq) = gcd(σ(p), σ(q))
Correct answer
σ(pq) = σ(p)σ(q)
Download Single Question PDF
Save this question and verified answer as a clean study sheet with live clickable link.
Share with Friends & Study Groups
Challenge your peer aspirants on WhatsApp or Telegram to solve this question!
Preparing for Mathematics?
Practice full-length mock tests with real exam timers, instant score analysis, and all-India ranking.
Want more practice questions on Number Theory?
Solve complete topic-wise tests with detailed solutions on GkGet.
Related Practice Questions
Recommended practice questions in Mathematics · Number Theory