λ
Sequence Observatory

81,379

17 × 4787
Deficient Odd Composite

Starting at 81,379, the Collatz iteration reaches 1 after 37 steps. The first transition is 244138; the starting value is odd with 4 positive divisors.

Prime Factor Structure

Factorization String 17 × 4787
Distinct Prime Factors 2
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 4
Divisor Sum (σ) 86,184
Proper Divisor Sum 4,805
Digit Sum / Digital Root 28 (Root: 1)
Adjacent Primes #81373 ← → #81401

Radix Representation

Decimal 81379
Binary 10011110111100011 (17 bits)
Octal 0o236743
Hexadecimal 0x13DE3

Divisor Catalog (4)

1 17 4,787 81,379

Collatz Trajectory (37 steps to reach 1)

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

81,379 244,138 122,069 366,208 183,104 91,552 45,776 22,888 11,444 5,722 2,861 8,584 4,292 2,146 1,073 3,220 1,610 805 2,416 1,208 604 302 151 454 227 682 341 1,024 512 256 128 64 32 16 8 4 2 1

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