21,396,739

7 × 13 × 23 × 10223

Prime Factor Structure

Factorization String 7 × 13 × 23 × 10223

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Total Divisors 16

Divisor Sum (σ) 27,482,112

Proper Divisor Sum 6,085,373

Digit Sum / Digital Root 40 (Root: 4)

Adjacent Primes #21396733 ← → #21396743

1 7 13 23 91 161 299 2,093 10,223 71,561 132,899 235,129 930,293 1,645,903 3,056,677 21,396,739

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

21,396,739 64,190,218 32,095,109 96,285,328 48,142,664 24,071,332 12,035,666 6,017,833 18,053,500 9,026,750 4,513,375 13,540,126 6,770,063 20,310,190 10,155,095 30,465,286 15,232,643 45,697,930 22,848,965 68,546,896 34,273,448 17,136,724 8,568,362 4,284,181 12,852,544 6,426,272 3,213,136 1,606,568 803,284 401,642 200,821 602,464 301,232 150,616 75,308 37,654 18,827 56,482 28,241 84,724 42,362 21,181 63,544 31,772 15,886 7,943 23,830 11,915 35,746 17,873 53,620 26,810 13,405 40,216 20,108 10,054 5,027 15,082 7,541 22,624

Browse other published profiles and their separate link collections.

No other profiles in this collection.