18721287

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{773}}^1$

素因数の和:821

約数の個数: 40

約数和(自身を含む): 31467744

約数和(自身を除く): 12746457

約数列:

[1, 3, 9, 13, 23, 27, 39, 69, 81, 117, 207, 299, 351, 621, 773, 897, 1053, 1863, 2319, 2691, 6957, 8073, 10049, 17779, 20871, 24219, 30147, 53337, 62613, 90441, 160011, 231127, 271323, 480033, 693381, 813969, 1440099, 2080143, 6240429, 18721287]

約数ペア:

[(1, 18721287), (3, 6240429), (9, 2080143), (13, 1440099), (23, 813969), (27, 693381), (39, 480033), (69, 271323), (81, 231127), (117, 160011), (207, 90441), (299, 62613), (351, 53337), (621, 30147), (773, 24219), (897, 20871), (1053, 17779), (1863, 10049), (2319, 8073), (2691, 6957)]