λ
Sequence Observatory

213,798

2 × 3 × 13 × 2741
Abundant Even Composite

Starting at 213,798, the Collatz iteration reaches 1 after 98 steps. The first transition is 106899; the starting value is even with 16 positive divisors.

Prime Factor Structure

Factorization String 2 × 3 × 13 × 2741
Distinct Prime Factors 4
Square Status No
Abundance Measure Abundant

Analytical Properties

Total Divisors 16
Divisor Sum (σ) 460,656
Proper Divisor Sum 246,858
Digit Sum / Digital Root 30 (Root: 3)
Adjacent Primes #213791 ← → #213799

Radix Representation

Decimal 213798
Binary 110100001100100110 (18 bits)
Octal 0o641446
Hexadecimal 0x34326

Divisor Catalog (16)

1 2 3 6 13 26 39 78 2,741 5,482 8,223 16,446 35,633 71,266 106,899 213,798

Collatz Trajectory (98 steps to reach 1)

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

213,798 106,899 320,698 160,349 481,048 240,524 120,262 60,131 180,394 90,197 270,592 135,296 67,648 33,824 16,912 8,456 4,228 2,114 1,057 3,172 1,586 793 2,380 1,190 595 1,786 893 2,680 1,340 670 335 1,006 503 1,510 755 2,266 1,133 3,400 1,700 850 425 1,276 638 319 958 479 1,438 719 2,158 1,079 3,238 1,619 4,858 2,429 7,288 3,644 1,822 911 2,734 1,367

More profiles

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