21,576,861

3⁴ × 266381

21,576,861 factors as 3^4 × 266381. Its 10 positive divisors give a proper-divisor sum of 10,655,361, so this integer is deficient. The Collatz stopping time is 141 steps.

Prime Factor Structure

Factorization String 3^4 × 266381

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 10

Divisor Sum (σ) 32,232,222

Proper Divisor Sum 10,655,361

Digit Sum / Digital Root 36 (Root: 9)

Adjacent Primes #21576853 ← → #21576889

Radix Representation

Decimal	21576861
Binary	1010010010011110010011101 (25 bits)
Octal	0o122236235
Hexadecimal	0x1493C9D

Divisor Catalog (10)

1 3 9 27 81 266,381 799,143 2,397,429 7,192,287 21,576,861

Collatz Trajectory (141 steps to reach 1)

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

21,576,861 64,730,584 32,365,292 16,182,646 8,091,323 24,273,970 12,136,985 36,410,956 18,205,478 9,102,739 27,308,218 13,654,109 40,962,328 20,481,164 10,240,582 5,120,291 15,360,874 7,680,437 23,041,312 11,520,656 5,760,328 2,880,164 1,440,082 720,041 2,160,124 1,080,062 540,031 1,620,094 810,047 2,430,142 1,215,071 3,645,214 1,822,607 5,467,822 2,733,911 8,201,734 4,100,867 12,302,602 6,151,301 18,453,904 9,226,952 4,613,476 2,306,738 1,153,369 3,460,108 1,730,054 865,027 2,595,082 1,297,541 3,892,624 1,946,312 973,156 486,578 243,289 729,868 364,934 182,467 547,402 273,701 821,104

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