λ
Sequence Observatory

2,907,345

3 × 5 × 7 × 27689
Deficient Odd Composite

Starting at 2,907,345, the Collatz iteration reaches 1 after 151 steps. The first transition is 8722036; the starting value is odd with 16 positive divisors.

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Prime Factor Structure

Factorization String 3 × 5 × 7 × 27689
Distinct Prime Factors 4
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 16
Divisor Sum (σ) 5,316,480
Proper Divisor Sum 2,409,135
Digit Sum / Digital Root 30 (Root: 3)
Adjacent Primes #2907329 ← → #2907347

Radix Representation

Decimal 2907345
Binary 1011000101110011010001 (22 bits)
Octal 0o13056321
Hexadecimal 0x2C5CD1

Divisor Catalog (5 of 16)

1 3 5 7 15

Collatz Trajectory (151 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.

2,907,345 8,722,036 4,361,018 2,180,509 6,541,528

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