18421731

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{127}}^1\times {\mathrm{227}}^1$

素因数の和:431

約数の個数: 24

約数和(自身を含む): 27316224

約数和(自身を除く): 8894493

約数列:

[1, 3, 9, 71, 127, 213, 227, 381, 639, 681, 1143, 2043, 9017, 16117, 27051, 28829, 48351, 81153, 86487, 145053, 259461, 2046859, 6140577, 18421731]

約数ペア:

[(1, 18421731), (3, 6140577), (9, 2046859), (71, 259461), (127, 145053), (213, 86487), (227, 81153), (381, 48351), (639, 28829), (681, 27051), (1143, 16117), (2043, 9017)]