21,621,441

3 × 7207147

21,621,441 factors as 3 × 7207147. Its 4 positive divisors give a proper-divisor sum of 7,207,151, so this integer is deficient. The Collatz stopping time is 234 steps.

Prime Factor Structure

Factorization String 3 × 7207147

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 28,828,592

Proper Divisor Sum 7,207,151

Digit Sum / Digital Root 21 (Root: 3)

Adjacent Primes #21621437 ← → #21621463

Radix Representation

Decimal	21621441
Binary	1010010011110101011000001 (25 bits)
Octal	0o122365301
Hexadecimal	0x149EAC1

Divisor Catalog (4)

1 3 7,207,147 21,621,441

Collatz Trajectory (234 steps to reach 1)

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

21,621,441 64,864,324 32,432,162 16,216,081 48,648,244 24,324,122 12,162,061 36,486,184 18,243,092 9,121,546 4,560,773 13,682,320 6,841,160 3,420,580 1,710,290 855,145 2,565,436 1,282,718 641,359 1,924,078 962,039 2,886,118 1,443,059 4,329,178 2,164,589 6,493,768 3,246,884 1,623,442 811,721 2,435,164 1,217,582 608,791 1,826,374 913,187 2,739,562 1,369,781 4,109,344 2,054,672 1,027,336 513,668 256,834 128,417 385,252 192,626 96,313 288,940 144,470 72,235 216,706 108,353 325,060 162,530 81,265 243,796 121,898 60,949 182,848 91,424 45,712 22,856

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