Representation numerals

π

٨٠

LXXX

●●●●

ↂ

八十

פ

Numeral systems

Binary: 1010000

Septimal (base 7): 143

Octal: 120

Hexadecimal: 50

Base 24: 38

Factorization

80 = 2 × 2 × 2 × 2 × 5

80 has 10 divisors: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80

Sum of all divisors other than 80: 106

Sums & differences

Sum of 2 squares: 80 = 8^{2} + 4^{2}

Difference of 2 squares: 80 = 12^{2} - 8^{2} = 21^{2} - 19^{2}

Goldbach conjecture: 80 = 73 + 7 = 67 + 13 = 61 + 19 = 43 + 37

Characteristics