λ
Sigma Notebook

1,646,255

5 × 13 × 19 × 31 × 43
Deficient Odd Composite

1,646,255 is odd and not a perfect square. Its factorization is 5 × 13 × 19 × 31 × 43 and its 32 divisors sum to 2,365,440.

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Prime Factor Structure

Factorization String 5 × 13 × 19 × 31 × 43
Distinct Prime Factors 5
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 32
Divisor Sum (σ) 2,365,440
Proper Divisor Sum 719,185
Digit Sum / Digital Root 29 (Root: 2)
Adjacent Primes #1646237 ← → #1646261

Radix Representation

Decimal 1646255
Binary 110010001111010101111 (21 bits)
Octal 0o6217257
Hexadecimal 0x191EAF

Divisor Catalog (5 of 32)

1 5 13 19 31

Collatz Trajectory (88 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.

1,646,255 4,938,766 2,469,383 7,408,150 3,704,075

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