18990279

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{409}}^1$

素因数の和:500

約数の個数: 48

約数和(自身を含む): 34794240

約数和(自身を除く): 15803961

約数列:

[1, 3, 7, 9, 11, 21, 33, 63, 67, 77, 99, 201, 231, 409, 469, 603, 693, 737, 1227, 1407, 2211, 2863, 3681, 4221, 4499, 5159, 6633, 8589, 13497, 15477, 25767, 27403, 31493, 40491, 46431, 82209, 94479, 191821, 246627, 283437, 301433, 575463, 904299, 1726389, 2110031, 2712897, 6330093, 18990279]

約数ペア:

[(1, 18990279), (3, 6330093), (7, 2712897), (9, 2110031), (11, 1726389), (21, 904299), (33, 575463), (63, 301433), (67, 283437), (77, 246627), (99, 191821), (201, 94479), (231, 82209), (409, 46431), (469, 40491), (603, 31493), (693, 27403), (737, 25767), (1227, 15477), (1407, 13497), (2211, 8589), (2863, 6633), (3681, 5159), (4221, 4499)]