21242880

素因数分解:

$2^{10}\times 3^2\times 5^1\times {\mathrm{461}}^1$

素因数の和:492

約数の個数: 132

約数和(自身を含む): 73765692

約数和(自身を除く): 52522812

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 60, 64, 72, 80, 90, 96, 120, 128, 144, 160, 180, 192, 240, 256, 288, 320, 360, 384, 461, 480, 512, 576, 640, 720, 768, 922, 960, 1024, 1152, 1280, 1383, 1440, 1536, 1844, 1920, 2304, 2305, 2560, 2766, 2880, 3072, 3688, 3840, 4149, 4608, 4610, 5120, 5532, 5760, 6915, 7376, 7680, 8298, 9216, 9220, 11064, 11520, 13830, 14752, 15360, 16596, 18440, 20745, 22128, 23040, 27660, 29504, 33192, 36880, 41490, 44256, 46080, 55320, 59008, 66384, 73760, 82980, 88512, 110640, 118016, 132768, 147520, 165960, 177024, 221280, 236032, 265536, 295040, 331920, 354048, 442560, 472064, 531072, 590080, 663840, 708096, 885120, 1062144, 1180160, 1327680, 1416192, 1770240, 2124288, 2360320, 2655360, 3540480, 4248576, 5310720, 7080960, 10621440, 21242880]

約数ペア:

[(1, 21242880), (2, 10621440), (3, 7080960), (4, 5310720), (5, 4248576), (6, 3540480), (8, 2655360), (9, 2360320), (10, 2124288), (12, 1770240), (15, 1416192), (16, 1327680), (18, 1180160), (20, 1062144), (24, 885120), (30, 708096), (32, 663840), (36, 590080), (40, 531072), (45, 472064), (48, 442560), (60, 354048), (64, 331920), (72, 295040), (80, 265536), (90, 236032), (96, 221280), (120, 177024), (128, 165960), (144, 147520), (160, 132768), (180, 118016), (192, 110640), (240, 88512), (256, 82980), (288, 73760), (320, 66384), (360, 59008), (384, 55320), (461, 46080), (480, 44256), (512, 41490), (576, 36880), (640, 33192), (720, 29504), (768, 27660), (922, 23040), (960, 22128), (1024, 20745), (1152, 18440), (1280, 16596), (1383, 15360), (1440, 14752), (1536, 13830), (1844, 11520), (1920, 11064), (2304, 9220), (2305, 9216), (2560, 8298), (2766, 7680), (2880, 7376), (3072, 6915), (3688, 5760), (3840, 5532), (4149, 5120), (4608, 4610)]