21541212

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{409}}^1$

素因数の和:456

約数の個数: 144

約数和(自身を含む): 71635200

約数和(自身を除く): 50093988

約数列:

[1, 2, 3, 4, 6, 7, 9, 11, 12, 14, 18, 19, 21, 22, 28, 33, 36, 38, 42, 44, 57, 63, 66, 76, 77, 84, 99, 114, 126, 132, 133, 154, 171, 198, 209, 228, 231, 252, 266, 308, 342, 396, 399, 409, 418, 462, 532, 627, 684, 693, 798, 818, 836, 924, 1197, 1227, 1254, 1386, 1463, 1596, 1636, 1881, 2394, 2454, 2508, 2772, 2863, 2926, 3681, 3762, 4389, 4499, 4788, 4908, 5726, 5852, 7362, 7524, 7771, 8589, 8778, 8998, 11452, 13167, 13497, 14724, 15542, 17178, 17556, 17996, 23313, 25767, 26334, 26994, 31084, 31493, 34356, 40491, 46626, 51534, 52668, 53988, 54397, 62986, 69939, 80982, 85481, 93252, 94479, 103068, 108794, 125972, 139878, 161964, 163191, 170962, 188958, 217588, 256443, 279756, 283437, 326382, 341924, 377916, 489573, 512886, 566874, 598367, 652764, 769329, 979146, 1025772, 1133748, 1196734, 1538658, 1795101, 1958292, 2393468, 3077316, 3590202, 5385303, 7180404, 10770606, 21541212]

約数ペア:

[(1, 21541212), (2, 10770606), (3, 7180404), (4, 5385303), (6, 3590202), (7, 3077316), (9, 2393468), (11, 1958292), (12, 1795101), (14, 1538658), (18, 1196734), (19, 1133748), (21, 1025772), (22, 979146), (28, 769329), (33, 652764), (36, 598367), (38, 566874), (42, 512886), (44, 489573), (57, 377916), (63, 341924), (66, 326382), (76, 283437), (77, 279756), (84, 256443), (99, 217588), (114, 188958), (126, 170962), (132, 163191), (133, 161964), (154, 139878), (171, 125972), (198, 108794), (209, 103068), (228, 94479), (231, 93252), (252, 85481), (266, 80982), (308, 69939), (342, 62986), (396, 54397), (399, 53988), (409, 52668), (418, 51534), (462, 46626), (532, 40491), (627, 34356), (684, 31493), (693, 31084), (798, 26994), (818, 26334), (836, 25767), (924, 23313), (1197, 17996), (1227, 17556), (1254, 17178), (1386, 15542), (1463, 14724), (1596, 13497), (1636, 13167), (1881, 11452), (2394, 8998), (2454, 8778), (2508, 8589), (2772, 7771), (2863, 7524), (2926, 7362), (3681, 5852), (3762, 5726), (4389, 4908), (4499, 4788)]