21086307

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{17}}^2\times {\mathrm{67}}^1$

素因数の和:129

約数の個数: 54

約数和(自身を含む): 36094604

約数和(自身を除く): 15008297

約数列:

[1, 3, 9, 11, 17, 33, 51, 67, 99, 121, 153, 187, 201, 289, 363, 561, 603, 737, 867, 1089, 1139, 1683, 2057, 2211, 2601, 3179, 3417, 6171, 6633, 8107, 9537, 10251, 12529, 18513, 19363, 24321, 28611, 34969, 37587, 58089, 72963, 104907, 112761, 137819, 174267, 212993, 314721, 413457, 638979, 1240371, 1916937, 2342923, 7028769, 21086307]

約数ペア:

[(1, 21086307), (3, 7028769), (9, 2342923), (11, 1916937), (17, 1240371), (33, 638979), (51, 413457), (67, 314721), (99, 212993), (121, 174267), (153, 137819), (187, 112761), (201, 104907), (289, 72963), (363, 58089), (561, 37587), (603, 34969), (737, 28611), (867, 24321), (1089, 19363), (1139, 18513), (1683, 12529), (2057, 10251), (2211, 9537), (2601, 8107), (3179, 6633), (3417, 6171)]