21378896

素因数分解:

$2^4\times 7^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1$

素因数の和:137

約数の個数: 120

約数和(自身を含む): 54791136

約数和(自身を除く): 33412240

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 22, 28, 37, 44, 49, 56, 67, 74, 77, 88, 98, 112, 134, 148, 154, 176, 196, 259, 268, 296, 308, 392, 407, 469, 518, 536, 539, 592, 616, 737, 784, 814, 938, 1036, 1072, 1078, 1232, 1474, 1628, 1813, 1876, 2072, 2156, 2479, 2849, 2948, 3256, 3283, 3626, 3752, 4144, 4312, 4958, 5159, 5698, 5896, 6512, 6566, 7252, 7504, 8624, 9916, 10318, 11396, 11792, 13132, 14504, 17353, 19832, 19943, 20636, 22792, 26264, 27269, 29008, 34706, 36113, 39664, 39886, 41272, 45584, 52528, 54538, 69412, 72226, 79772, 82544, 109076, 121471, 138824, 144452, 159544, 190883, 218152, 242942, 277648, 288904, 319088, 381766, 436304, 485884, 577808, 763532, 971768, 1336181, 1527064, 1943536, 2672362, 3054128, 5344724, 10689448, 21378896]

約数ペア:

[(1, 21378896), (2, 10689448), (4, 5344724), (7, 3054128), (8, 2672362), (11, 1943536), (14, 1527064), (16, 1336181), (22, 971768), (28, 763532), (37, 577808), (44, 485884), (49, 436304), (56, 381766), (67, 319088), (74, 288904), (77, 277648), (88, 242942), (98, 218152), (112, 190883), (134, 159544), (148, 144452), (154, 138824), (176, 121471), (196, 109076), (259, 82544), (268, 79772), (296, 72226), (308, 69412), (392, 54538), (407, 52528), (469, 45584), (518, 41272), (536, 39886), (539, 39664), (592, 36113), (616, 34706), (737, 29008), (784, 27269), (814, 26264), (938, 22792), (1036, 20636), (1072, 19943), (1078, 19832), (1232, 17353), (1474, 14504), (1628, 13132), (1813, 11792), (1876, 11396), (2072, 10318), (2156, 9916), (2479, 8624), (2849, 7504), (2948, 7252), (3256, 6566), (3283, 6512), (3626, 5896), (3752, 5698), (4144, 5159), (4312, 4958)]