λ
Sequence Observatory

71,146

2 × 35573
Deficient Even Composite

Starting at 71,146, the Collatz iteration reaches 1 after 187 steps. The first transition is 35573; the starting value is even with 4 positive divisors.

Resources

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Prime Factor Structure

Factorization String 2 × 35573
Distinct Prime Factors 2
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 4
Divisor Sum (σ) 106,722
Proper Divisor Sum 35,576
Digit Sum / Digital Root 19 (Root: 1)
Adjacent Primes #71143 ← → #71147

Radix Representation

Decimal 71146
Binary 10001010111101010 (17 bits)
Octal 0o212752
Hexadecimal 0x115EA

Divisor Catalog (4)

1 2 35,573 71,146

Collatz Trajectory (187 steps to reach 1)

Iterative sequence n → n/2 (if even) or 3n+1 (if odd):

Showing the first 5 trajectory entries; the stopping-time total above is unchanged.

71,146 35,573 106,720 53,360 26,680

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