Factors / Factors of 73

Factors of 73

1, 73

73 is prime: only factor pair is (1, 73), confirmed by trial division up to √73 ≈ 8.5 turning up nothing else. 73's full pair list is (1, 73), for 2 divisors in total. 73's divisors other than 73 itself sum to just 1, 72 below 73: the common deficient case. 73 is odd, digit sum 10 for 73; none of 2-12 divide 73 evenly. 73 has 2 divisors; 72 has 12 and 74 has 4, so 72 wins here. 73 divided by its largest divisor, 1, gives 73.