19809279

素因数分解:

$3^4\times 7^3\times {\mathrm{23}}^1\times {\mathrm{31}}^1$

素因数の和:87

約数の個数: 80

約数和(自身を含む): 37171200

約数和(自身を除く): 17361921

約数列:

[1, 3, 7, 9, 21, 23, 27, 31, 49, 63, 69, 81, 93, 147, 161, 189, 207, 217, 279, 343, 441, 483, 567, 621, 651, 713, 837, 1029, 1127, 1323, 1449, 1519, 1863, 1953, 2139, 2511, 3087, 3381, 3969, 4347, 4557, 4991, 5859, 6417, 7889, 9261, 10143, 10633, 13041, 13671, 14973, 17577, 19251, 23667, 27783, 30429, 31899, 34937, 41013, 44919, 57753, 71001, 91287, 95697, 104811, 123039, 134757, 213003, 244559, 287091, 314433, 404271, 639009, 733677, 861273, 943299, 2201031, 2829897, 6603093, 19809279]

約数ペア:

[(1, 19809279), (3, 6603093), (7, 2829897), (9, 2201031), (21, 943299), (23, 861273), (27, 733677), (31, 639009), (49, 404271), (63, 314433), (69, 287091), (81, 244559), (93, 213003), (147, 134757), (161, 123039), (189, 104811), (207, 95697), (217, 91287), (279, 71001), (343, 57753), (441, 44919), (483, 41013), (567, 34937), (621, 31899), (651, 30429), (713, 27783), (837, 23667), (1029, 19251), (1127, 17577), (1323, 14973), (1449, 13671), (1519, 13041), (1863, 10633), (1953, 10143), (2139, 9261), (2511, 7889), (3087, 6417), (3381, 5859), (3969, 4991), (4347, 4557)]