λ
Sigma Notebook

105,865

5 × 31 × 683
Deficient Odd Composite

105,865 is odd and not a perfect square. Its factorization is 5 × 31 × 683 and its 8 divisors sum to 131,328.

Prime Factor Structure

Factorization String 5 × 31 × 683
Distinct Prime Factors 3
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 8
Divisor Sum (σ) 131,328
Proper Divisor Sum 25,463
Digit Sum / Digital Root 25 (Root: 7)
Adjacent Primes #105863 ← → #105871

Radix Representation

Decimal 105865
Binary 11001110110001001 (17 bits)
Octal 0o316611
Hexadecimal 0x19D89

Divisor Catalog (8)

1 5 31 155 683 3,415 21,173 105,865

Collatz Trajectory (53 steps to reach 1)

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

105,865 317,596 158,798 79,399 238,198 119,099 357,298 178,649 535,948 267,974 133,987 401,962 200,981 602,944 301,472 150,736 75,368 37,684 18,842 9,421 28,264 14,132 7,066 3,533 10,600 5,300 2,650 1,325 3,976 1,988 994 497 1,492 746 373 1,120 560 280 140 70 35 106 53 160 80 40 20 10 5 16 8 4 2 1

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