λ
Sequence Observatory

3,207,731

113 × 28387
Deficient Odd Composite

Starting at 3,207,731, the Collatz iteration reaches 1 after 71 steps. The first transition is 9623194; the starting value is odd with 4 positive divisors.

Prime Factor Structure

Factorization String 113 × 28387
Distinct Prime Factors 2
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 4
Divisor Sum (σ) 3,236,232
Proper Divisor Sum 28,501
Digit Sum / Digital Root 23 (Root: 5)
Adjacent Primes #3207727 ← → #3207733

Radix Representation

Decimal 3207731
Binary 1100001111001000110011 (22 bits)
Octal 0o14171063
Hexadecimal 0x30F233

Divisor Catalog (4)

1 113 28,387 3,207,731

Collatz Trajectory (71 steps to reach 1)

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

3,207,731 9,623,194 4,811,597 14,434,792 7,217,396 3,608,698 1,804,349 5,413,048 2,706,524 1,353,262 676,631 2,029,894 1,014,947 3,044,842 1,522,421 4,567,264 2,283,632 1,141,816 570,908 285,454 142,727 428,182 214,091 642,274 321,137 963,412 481,706 240,853 722,560 361,280 180,640 90,320 45,160 22,580 11,290 5,645 16,936 8,468 4,234 2,117 6,352 3,176 1,588 794 397 1,192 596 298 149 448 224 112 56 28 14 7 22 11 34 17

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