λ
Sigma Notebook

73,728

213 × 32
Abundant Even Composite

73,728 is even and not a perfect square. Its factorization is 2^13 × 3^2 and its 42 divisors sum to 212,979.

Prime Factor Structure

Factorization String 2^13 × 3^2
Distinct Prime Factors 2
Square Status No
Abundance Measure Abundant

Analytical Properties

Total Divisors 42
Divisor Sum (σ) 212,979
Proper Divisor Sum 139,251
Digit Sum / Digital Root 27 (Root: 9)
Adjacent Primes #73727 ← → #73751

Radix Representation

Decimal 73728
Binary 10010000000000000 (17 bits)
Octal 0o220000
Hexadecimal 0x12000

Divisor Catalog (42)

1 2 3 4 6 8 9 12 16 18 24 32 36 48 64 72 96 128 144 192 256 288 384 512 576 768 1,024 1,152 1,536 2,048 2,304 3,072 4,096 4,608 6,144 8,192 9,216 12,288 18,432 24,576 36,864 73,728

Collatz Trajectory (32 steps to reach 1)

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

73,728 36,864 18,432 9,216 4,608 2,304 1,152 576 288 144 72 36 18 9 28 14 7 22 11 34 17 52 26 13 40 20 10 5 16 8 4 2 1

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