21,395,760

2⁴ × 3 × 5 × 59 × 1511

Prime Factor Structure

Factorization String 2^4 × 3 × 5 × 59 × 1511

Distinct Prime Factors 5

Square Status No

Abundance Measure Abundant

Total Divisors 80

Divisor Sum (σ) 67,495,680

Proper Divisor Sum 46,099,920

Digit Sum / Digital Root 33 (Root: 6)

Adjacent Primes #21395747 ← → #21395761

1 2 3 4 5 6 8 10 12 15 16 20 24 30 40 48 59 60 80 118 120 177 236 240 295 354 472 590 708 885 944 1,180 1,416 1,511 1,770 2,360 2,832 3,022 3,540 4,533 4,720 6,044 7,080 7,555 9,066 12,088 14,160 15,110 18,132 22,665 24,176 30,220 36,264 45,330 60,440 72,528 89,149 90,660 120,880 178,298

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

21,395,760 10,697,880 5,348,940 2,674,470 1,337,235 4,011,706 2,005,853 6,017,560 3,008,780 1,504,390 752,195 2,256,586 1,128,293 3,384,880 1,692,440 846,220 423,110 211,555 634,666 317,333 952,000 476,000 238,000 119,000 59,500 29,750 14,875 44,626 22,313 66,940 33,470 16,735 50,206 25,103 75,310 37,655 112,966 56,483 169,450 84,725 254,176 127,088 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

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