3 × 6991

Prime Factor Structure

Factorization String 3 × 6991

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 27,968

Proper Divisor Sum 6,995

Digit Sum / Digital Root 21 (Root: 3)

Adjacent Primes #20963 ← → #20981

1 3 6,991 20,973

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

20,973 62,920 31,460 15,730 7,865 23,596 11,798 5,899 17,698 8,849 26,548 13,274 6,637 19,912 9,956 4,978 2,489 7,468 3,734 1,867 5,602 2,801 8,404 4,202 2,101 6,304 3,152 1,576 788 394 197 592 296 148 74 37 112 56 28 14 7 22 11 34 17 52 26 13 40 20 10 5 16 8 4 2 1

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