λ
Sequence Observatory

6,810,681

3 × 73 × 137 × 227
Deficient Odd Composite

Starting at 6,810,681, the Collatz iteration reaches 1 after 191 steps. The first transition is 20432044; the starting value is odd with 16 positive divisors.

Prime Factor Structure

Factorization String 3 × 73 × 137 × 227
Distinct Prime Factors 4
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 16
Divisor Sum (σ) 9,313,344
Proper Divisor Sum 2,502,663
Digit Sum / Digital Root 30 (Root: 3)
Adjacent Primes #6810677 ← → #6810703

Radix Representation

Decimal 6810681
Binary 11001111110110000111001 (23 bits)
Octal 0o31766071
Hexadecimal 0x67EC39

Divisor Catalog (16)

1 3 73 137 219 227 411 681 10,001 16,571 30,003 31,099 49,713 93,297 2,270,227 6,810,681

Collatz Trajectory (191 steps to reach 1)

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

6,810,681 20,432,044 10,216,022 5,108,011 15,324,034 7,662,017 22,986,052 11,493,026 5,746,513 17,239,540 8,619,770 4,309,885 12,929,656 6,464,828 3,232,414 1,616,207 4,848,622 2,424,311 7,272,934 3,636,467 10,909,402 5,454,701 16,364,104 8,182,052 4,091,026 2,045,513 6,136,540 3,068,270 1,534,135 4,602,406 2,301,203 6,903,610 3,451,805 10,355,416 5,177,708 2,588,854 1,294,427 3,883,282 1,941,641 5,824,924 2,912,462 1,456,231 4,368,694 2,184,347 6,553,042 3,276,521 9,829,564 4,914,782 2,457,391 7,372,174 3,686,087 11,058,262 5,529,131 16,587,394 8,293,697 24,881,092 12,440,546 6,220,273 18,660,820 9,330,410

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