18120123

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{4051}}^1$

素因数の和:4135

約数の個数: 24

約数和(自身を含む): 30341376

約数和(自身を除く): 12221253

約数列:

[1, 3, 7, 9, 21, 63, 71, 213, 497, 639, 1491, 4051, 4473, 12153, 28357, 36459, 85071, 255213, 287621, 862863, 2013347, 2588589, 6040041, 18120123]

約数ペア:

[(1, 18120123), (3, 6040041), (7, 2588589), (9, 2013347), (21, 862863), (63, 287621), (71, 255213), (213, 85071), (497, 36459), (639, 28357), (1491, 12153), (4051, 4473)]