Answer
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φ(5) = 4
↓Steps Explained:↓
Calculate φ(5)
This is known as the totient
Calculate factors for 5
Factors < 5 with 1 as common factor
| # | Factor List | Matching Factors | Totient List? |
|---|---|---|---|
| 1 | 1 | 1 | Y |
| 2 | 1,2 | 1 | Y |
| 3 | 1,3 | 1 | Y |
| 4 | 1,2,4 | 1 | Y |
Build totient list
1,2,3,4
Final Answer
φ(5) = 4Take the Quiz Switch to Chat Mode
Related Calculators: Prime Numbers | Factorization | Fraction Cancellation Property