λ
Sequence Observatory

3,973,696

26 × 29 × 2141
Abundant Even Composite

Starting at 3,973,696, the Collatz iteration reaches 1 after 141 steps. The first transition is 1986848; the starting value is even with 28 positive divisors.

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Prime Factor Structure

Factorization String 2^6 × 29 × 2141
Distinct Prime Factors 3
Square Status No
Abundance Measure Abundant

Analytical Properties

Total Divisors 28
Divisor Sum (σ) 8,161,020
Proper Divisor Sum 4,187,324
Digit Sum / Digital Root 43 (Root: 7)
Adjacent Primes #3973691 ← → #3973727

Radix Representation

Decimal 3973696
Binary 1111001010001001000000 (22 bits)
Octal 0o17121100
Hexadecimal 0x3CA240

Divisor Catalog (5 of 28)

1 2 4 8 16

Collatz Trajectory (141 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.

3,973,696 1,986,848 993,424 496,712 248,356

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