20,742,425

5² × 11² × 6857

Prime Factor Structure

Factorization String 5^2 × 11^2 × 6857

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Total Divisors 18

Divisor Sum (σ) 28,275,534

Proper Divisor Sum 7,533,109

Digit Sum / Digital Root 26 (Root: 8)

Adjacent Primes #20742413 ← → #20742443

1 5 11 25 55 121 275 605 3,025 6,857 34,285 75,427 171,425 377,135 829,697 1,885,675 4,148,485 20,742,425

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

20,742,425 62,227,276 31,113,638 15,556,819 46,670,458 23,335,229 70,005,688 35,002,844 17,501,422 8,750,711 26,252,134 13,126,067 39,378,202 19,689,101 59,067,304 29,533,652 14,766,826 7,383,413 22,150,240 11,075,120 5,537,560 2,768,780 1,384,390 692,195 2,076,586 1,038,293 3,114,880 1,557,440 778,720 389,360 194,680 97,340 48,670 24,335 73,006 36,503 109,510 54,755 164,266 82,133 246,400 123,200 61,600 30,800 15,400 7,700 3,850 1,925 5,776 2,888 1,444 722 361 1,084 542 271 814 407 1,222 611

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