21,396,722

2 × 29² × 12721

Prime Factor Structure

Factorization String 2 × 29^2 × 12721

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Total Divisors 12

Divisor Sum (σ) 33,242,586

Proper Divisor Sum 11,845,864

Digit Sum / Digital Root 32 (Root: 5)

Adjacent Primes #21396709 ← → #21396731

1 2 29 58 841 1,682 12,721 25,442 368,909 737,818 10,698,361 21,396,722

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

21,396,722 10,698,361 32,095,084 16,047,542 8,023,771 24,071,314 12,035,657 36,106,972 18,053,486 9,026,743 27,080,230 13,540,115 40,620,346 20,310,173 60,930,520 30,465,260 15,232,630 7,616,315 22,848,946 11,424,473 34,273,420 17,136,710 8,568,355 25,705,066 12,852,533 38,557,600 19,278,800 9,639,400 4,819,700 2,409,850 1,204,925 3,614,776 1,807,388 903,694 451,847 1,355,542 677,771 2,033,314 1,016,657 3,049,972 1,524,986 762,493 2,287,480 1,143,740 571,870 285,935 857,806 428,903 1,286,710 643,355 1,930,066 965,033 2,895,100 1,447,550 723,775 2,171,326 1,085,663 3,256,990 1,628,495 4,885,486

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