20904920320

素因数分解:

$2^8\times 5^1\times {\mathrm{227}}^1\times {\mathrm{71947}}^1$

素因数の和:72195

約数の個数: 72

約数和(自身を含む): 50295105504

約数和(自身を除く): 29390185184

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 227, 256, 320, 454, 640, 908, 1135, 1280, 1816, 2270, 3632, 4540, 7264, 9080, 14528, 18160, 29056, 36320, 58112, 71947, 72640, 143894, 145280, 287788, 290560, 359735, 575576, 719470, 1151152, 1438940, 2302304, 2877880, 4604608, 5755760, 9209216, 11511520, 16331969, 18418432, 23023040, 32663938, 46046080, 65327876, 81659845, 92092160, 130655752, 163319690, 261311504, 326639380, 522623008, 653278760, 1045246016, 1306557520, 2090492032, 2613115040, 4180984064, 5226230080, 10452460160, 20904920320]

約数ペア:

[(1, 20904920320), (2, 10452460160), (4, 5226230080), (5, 4180984064), (8, 2613115040), (10, 2090492032), (16, 1306557520), (20, 1045246016), (32, 653278760), (40, 522623008), (64, 326639380), (80, 261311504), (128, 163319690), (160, 130655752), (227, 92092160), (256, 81659845), (320, 65327876), (454, 46046080), (640, 32663938), (908, 23023040), (1135, 18418432), (1280, 16331969), (1816, 11511520), (2270, 9209216), (3632, 5755760), (4540, 4604608), (7264, 2877880), (9080, 2302304), (14528, 1438940), (18160, 1151152), (29056, 719470), (36320, 575576), (58112, 359735), (71947, 290560), (72640, 287788), (143894, 145280)]