21,115,241

7 × 17 × 191 × 929

21,115,241 factors as 7 × 17 × 191 × 929. Its 16 positive divisors give a proper-divisor sum of 4,597,399, so this integer is deficient. The Collatz stopping time is 172 steps.

Prime Factor Structure

Factorization String 7 × 17 × 191 × 929

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 25,712,640

Proper Divisor Sum 4,597,399

Digit Sum / Digital Root 17 (Root: 8)

Adjacent Primes #21115231 ← → #21115249

Radix Representation

Decimal	21115241
Binary	1010000100011000101101001 (25 bits)
Octal	0o120430551
Hexadecimal	0x1423169

Divisor Catalog (16)

1 7 17 119 191 929 1,337 3,247 6,503 15,793 22,729 110,551 177,439 1,242,073 3,016,463 21,115,241

Collatz Trajectory (172 steps to reach 1)

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

21,115,241 63,345,724 31,672,862 15,836,431 47,509,294 23,754,647 71,263,942 35,631,971 106,895,914 53,447,957 160,343,872 80,171,936 40,085,968 20,042,984 10,021,492 5,010,746 2,505,373 7,516,120 3,758,060 1,879,030 939,515 2,818,546 1,409,273 4,227,820 2,113,910 1,056,955 3,170,866 1,585,433 4,756,300 2,378,150 1,189,075 3,567,226 1,783,613 5,350,840 2,675,420 1,337,710 668,855 2,006,566 1,003,283 3,009,850 1,504,925 4,514,776 2,257,388 1,128,694 564,347 1,693,042 846,521 2,539,564 1,269,782 634,891 1,904,674 952,337 2,857,012 1,428,506 714,253 2,142,760 1,071,380 535,690 267,845 803,536

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