λ
Sigma Notebook

161,509

373 × 433
Deficient Odd Composite

161,509 is odd and not a perfect square. Its factorization is 373 × 433 and its 4 divisors sum to 162,316.

Prime Factor Structure

Factorization String 373 × 433
Distinct Prime Factors 2
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 4
Divisor Sum (σ) 162,316
Proper Divisor Sum 807
Digit Sum / Digital Root 22 (Root: 4)
Adjacent Primes #161507 ← → #161521

Radix Representation

Decimal 161509
Binary 100111011011100101 (18 bits)
Octal 0o473345
Hexadecimal 0x276E5

Divisor Catalog (4)

1 373 433 161,509

Collatz Trajectory (139 steps to reach 1)

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

161,509 484,528 242,264 121,132 60,566 30,283 90,850 45,425 136,276 68,138 34,069 102,208 51,104 25,552 12,776 6,388 3,194 1,597 4,792 2,396 1,198 599 1,798 899 2,698 1,349 4,048 2,024 1,012 506 253 760 380 190 95 286 143 430 215 646 323 970 485 1,456 728 364 182 91 274 137 412 206 103 310 155 466 233 700 350 175

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