20999218688

素因数分解:

$2^9\times 7^1\times {\mathrm{199}}^1\times {\mathrm{29443}}^1$

素因数の和:29667

約数の個数: 80

約数和(自身を含む): 48193939200

約数和(自身を除く): 27194720512

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 64, 112, 128, 199, 224, 256, 398, 448, 512, 796, 896, 1393, 1592, 1792, 2786, 3184, 3584, 5572, 6368, 11144, 12736, 22288, 25472, 29443, 44576, 50944, 58886, 89152, 101888, 117772, 178304, 206101, 235544, 356608, 412202, 471088, 713216, 824404, 942176, 1648808, 1884352, 3297616, 3768704, 5859157, 6595232, 7537408, 11718314, 13190464, 15074816, 23436628, 26380928, 41014099, 46873256, 52761856, 82028198, 93746512, 105523712, 164056396, 187493024, 328112792, 374986048, 656225584, 749972096, 1312451168, 1499944192, 2624902336, 2999888384, 5249804672, 10499609344, 20999218688]

約数ペア:

[(1, 20999218688), (2, 10499609344), (4, 5249804672), (7, 2999888384), (8, 2624902336), (14, 1499944192), (16, 1312451168), (28, 749972096), (32, 656225584), (56, 374986048), (64, 328112792), (112, 187493024), (128, 164056396), (199, 105523712), (224, 93746512), (256, 82028198), (398, 52761856), (448, 46873256), (512, 41014099), (796, 26380928), (896, 23436628), (1393, 15074816), (1592, 13190464), (1792, 11718314), (2786, 7537408), (3184, 6595232), (3584, 5859157), (5572, 3768704), (6368, 3297616), (11144, 1884352), (12736, 1648808), (22288, 942176), (25472, 824404), (29443, 713216), (44576, 471088), (50944, 412202), (58886, 356608), (89152, 235544), (101888, 206101), (117772, 178304)]