809987840

素因数分解:

$2^8\times 5^1\times {\mathrm{31}}^1\times {\mathrm{137}}^1\times {\mathrm{149}}^1$

素因数の和:338

約数の個数: 144

約数和(自身を含む): 2030918400

約数和(自身を除く): 1220930560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 137, 149, 155, 160, 248, 256, 274, 298, 310, 320, 496, 548, 596, 620, 640, 685, 745, 992, 1096, 1192, 1240, 1280, 1370, 1490, 1984, 2192, 2384, 2480, 2740, 2980, 3968, 4247, 4384, 4619, 4768, 4960, 5480, 5960, 7936, 8494, 8768, 9238, 9536, 9920, 10960, 11920, 16988, 17536, 18476, 19072, 19840, 20413, 21235, 21920, 23095, 23840, 33976, 35072, 36952, 38144, 39680, 40826, 42470, 43840, 46190, 47680, 67952, 73904, 81652, 84940, 87680, 92380, 95360, 102065, 135904, 147808, 163304, 169880, 175360, 184760, 190720, 204130, 271808, 295616, 326608, 339760, 369520, 408260, 543616, 591232, 632803, 653216, 679520, 739040, 816520, 1087232, 1182464, 1265606, 1306432, 1359040, 1478080, 1633040, 2531212, 2612864, 2718080, 2956160, 3164015, 3266080, 5062424, 5225728, 5436160, 5912320, 6328030, 6532160, 10124848, 12656060, 13064320, 20249696, 25312120, 26128640, 40499392, 50624240, 80998784, 101248480, 161997568, 202496960, 404993920, 809987840]

約数ペア:

[(1, 809987840), (2, 404993920), (4, 202496960), (5, 161997568), (8, 101248480), (10, 80998784), (16, 50624240), (20, 40499392), (31, 26128640), (32, 25312120), (40, 20249696), (62, 13064320), (64, 12656060), (80, 10124848), (124, 6532160), (128, 6328030), (137, 5912320), (149, 5436160), (155, 5225728), (160, 5062424), (248, 3266080), (256, 3164015), (274, 2956160), (298, 2718080), (310, 2612864), (320, 2531212), (496, 1633040), (548, 1478080), (596, 1359040), (620, 1306432), (640, 1265606), (685, 1182464), (745, 1087232), (992, 816520), (1096, 739040), (1192, 679520), (1240, 653216), (1280, 632803), (1370, 591232), (1490, 543616), (1984, 408260), (2192, 369520), (2384, 339760), (2480, 326608), (2740, 295616), (2980, 271808), (3968, 204130), (4247, 190720), (4384, 184760), (4619, 175360), (4768, 169880), (4960, 163304), (5480, 147808), (5960, 135904), (7936, 102065), (8494, 95360), (8768, 92380), (9238, 87680), (9536, 84940), (9920, 81652), (10960, 73904), (11920, 67952), (16988, 47680), (17536, 46190), (18476, 43840), (19072, 42470), (19840, 40826), (20413, 39680), (21235, 38144), (21920, 36952), (23095, 35072), (23840, 33976)]