21,023,972

2² × 5255993

21,023,972 factors as 2^2 × 5255993. Its 6 positive divisors give a proper-divisor sum of 15,767,986, so this integer is deficient. The Collatz stopping time is 115 steps.

Prime Factor Structure

Factorization String 2^2 × 5255993

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 6

Divisor Sum (σ) 36,791,958

Proper Divisor Sum 15,767,986

Digit Sum / Digital Root 26 (Root: 8)

Adjacent Primes #21023971 ← → #21024067

Radix Representation

Decimal	21023972
Binary	1010000001100110011100100 (25 bits)
Octal	0o120146344
Hexadecimal	0x140CCE4

Divisor Catalog (6)

1 2 4 5,255,993 10,511,986 21,023,972

Collatz Trajectory (115 steps to reach 1)

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

21,023,972 10,511,986 5,255,993 15,767,980 7,883,990 3,941,995 11,825,986 5,912,993 17,738,980 8,869,490 4,434,745 13,304,236 6,652,118 3,326,059 9,978,178 4,989,089 14,967,268 7,483,634 3,741,817 11,225,452 5,612,726 2,806,363 8,419,090 4,209,545 12,628,636 6,314,318 3,157,159 9,471,478 4,735,739 14,207,218 7,103,609 21,310,828 10,655,414 5,327,707 15,983,122 7,991,561 23,974,684 11,987,342 5,993,671 17,981,014 8,990,507 26,971,522 13,485,761 40,457,284 20,228,642 10,114,321 30,342,964 15,171,482 7,585,741 22,757,224 11,378,612 5,689,306 2,844,653 8,533,960 4,266,980 2,133,490 1,066,745 3,200,236 1,600,118 800,059

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