205150720

素因数分解:

$2^9\times 5^1\times {\mathrm{127}}^1\times {\mathrm{631}}^1$

素因数の和:781

約数の個数: 80

約数和(自身を含む): 496539648

約数和(自身を除く): 291388928

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 127, 128, 160, 254, 256, 320, 508, 512, 631, 635, 640, 1016, 1262, 1270, 1280, 2032, 2524, 2540, 2560, 3155, 4064, 5048, 5080, 6310, 8128, 10096, 10160, 12620, 16256, 20192, 20320, 25240, 32512, 40384, 40640, 50480, 65024, 80137, 80768, 81280, 100960, 160274, 161536, 162560, 201920, 320548, 323072, 325120, 400685, 403840, 641096, 801370, 807680, 1282192, 1602740, 1615360, 2564384, 3205480, 5128768, 6410960, 10257536, 12821920, 20515072, 25643840, 41030144, 51287680, 102575360, 205150720]

約数ペア:

[(1, 205150720), (2, 102575360), (4, 51287680), (5, 41030144), (8, 25643840), (10, 20515072), (16, 12821920), (20, 10257536), (32, 6410960), (40, 5128768), (64, 3205480), (80, 2564384), (127, 1615360), (128, 1602740), (160, 1282192), (254, 807680), (256, 801370), (320, 641096), (508, 403840), (512, 400685), (631, 325120), (635, 323072), (640, 320548), (1016, 201920), (1262, 162560), (1270, 161536), (1280, 160274), (2032, 100960), (2524, 81280), (2540, 80768), (2560, 80137), (3155, 65024), (4064, 50480), (5048, 40640), (5080, 40384), (6310, 32512), (8128, 25240), (10096, 20320), (10160, 20192), (12620, 16256)]