λ
Sequence Observatory

198,185

5 × 13 × 3049
Deficient Odd Composite

Starting at 198,185, the Collatz iteration reaches 1 after 98 steps. The first transition is 594556; the starting value is odd with 8 positive divisors.

Prime Factor Structure

Factorization String 5 × 13 × 3049
Distinct Prime Factors 3
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 8
Divisor Sum (σ) 256,200
Proper Divisor Sum 58,015
Digit Sum / Digital Root 32 (Root: 5)
Adjacent Primes #198179 ← → #198193

Radix Representation

Decimal 198185
Binary 110000011000101001 (18 bits)
Octal 0o603051
Hexadecimal 0x30629

Divisor Catalog (8)

1 5 13 65 3,049 15,245 39,637 198,185

Collatz Trajectory (98 steps to reach 1)

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

198,185 594,556 297,278 148,639 445,918 222,959 668,878 334,439 1,003,318 501,659 1,504,978 752,489 2,257,468 1,128,734 564,367 1,693,102 846,551 2,539,654 1,269,827 3,809,482 1,904,741 5,714,224 2,857,112 1,428,556 714,278 357,139 1,071,418 535,709 1,607,128 803,564 401,782 200,891 602,674 301,337 904,012 452,006 226,003 678,010 339,005 1,017,016 508,508 254,254 127,127 381,382 190,691 572,074 286,037 858,112 429,056 214,528 107,264 53,632 26,816 13,408 6,704 3,352 1,676 838 419 1,258

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