λ
Sequence Observatory

1,625,824

25 × 23 × 472
Abundant Even Composite

Starting at 1,625,824, the Collatz iteration reaches 1 after 44 steps. The first transition is 812912; the starting value is even with 36 positive divisors.

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Prime Factor Structure

Factorization String 2^5 × 23 × 47^2
Distinct Prime Factors 3
Square Status No
Abundance Measure Abundant

Analytical Properties

Total Divisors 36
Divisor Sum (σ) 3,412,584
Proper Divisor Sum 1,786,760
Digit Sum / Digital Root 28 (Root: 1)
Adjacent Primes #1625821 ← → #1625831

Radix Representation

Decimal 1625824
Binary 110001100111011100000 (21 bits)
Octal 0o6147340
Hexadecimal 0x18CEE0

Divisor Catalog (5 of 36)

1 2 4 8 16

Collatz Trajectory (44 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.

1,625,824 812,912 406,456 203,228 101,614

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