640926720

素因数分解:

$2^{10}\times 3^2\times 5^1\times 7^1\times {\mathrm{1987}}^1$

素因数の和:2025

約数の個数: 264

約数和(自身を含む): 2539328064

約数和(自身を除く): 1898401344

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 32, 35, 36, 40, 42, 45, 48, 56, 60, 63, 64, 70, 72, 80, 84, 90, 96, 105, 112, 120, 126, 128, 140, 144, 160, 168, 180, 192, 210, 224, 240, 252, 256, 280, 288, 315, 320, 336, 360, 384, 420, 448, 480, 504, 512, 560, 576, 630, 640, 672, 720, 768, 840, 896, 960, 1008, 1024, 1120, 1152, 1260, 1280, 1344, 1440, 1536, 1680, 1792, 1920, 1987, 2016, 2240, 2304, 2520, 2560, 2688, 2880, 3072, 3360, 3584, 3840, 3974, 4032, 4480, 4608, 5040, 5120, 5376, 5760, 5961, 6720, 7168, 7680, 7948, 8064, 8960, 9216, 9935, 10080, 10752, 11520, 11922, 13440, 13909, 15360, 15896, 16128, 17883, 17920, 19870, 20160, 21504, 23040, 23844, 26880, 27818, 29805, 31792, 32256, 35766, 35840, 39740, 40320, 41727, 46080, 47688, 53760, 55636, 59610, 63584, 64512, 69545, 71532, 79480, 80640, 83454, 89415, 95376, 107520, 111272, 119220, 125181, 127168, 139090, 143064, 158960, 161280, 166908, 178830, 190752, 208635, 222544, 238440, 250362, 254336, 278180, 286128, 317920, 322560, 333816, 357660, 381504, 417270, 445088, 476880, 500724, 508672, 556360, 572256, 625905, 635840, 667632, 715320, 763008, 834540, 890176, 953760, 1001448, 1017344, 1112720, 1144512, 1251810, 1271680, 1335264, 1430640, 1526016, 1669080, 1780352, 1907520, 2002896, 2034688, 2225440, 2289024, 2503620, 2543360, 2670528, 2861280, 3052032, 3338160, 3560704, 3815040, 4005792, 4450880, 4578048, 5007240, 5086720, 5341056, 5722560, 6104064, 6676320, 7121408, 7630080, 8011584, 8901760, 9156096, 10014480, 10173440, 10682112, 11445120, 13352640, 14242816, 15260160, 16023168, 17803520, 18312192, 20028960, 21364224, 22890240, 26705280, 30520320, 32046336, 35607040, 40057920, 42728448, 45780480, 53410560, 64092672, 71214080, 80115840, 91560960, 106821120, 128185344, 160231680, 213642240, 320463360, 640926720]

約数ペア:

[(1, 640926720), (2, 320463360), (3, 213642240), (4, 160231680), (5, 128185344), (6, 106821120), (7, 91560960), (8, 80115840), (9, 71214080), (10, 64092672), (12, 53410560), (14, 45780480), (15, 42728448), (16, 40057920), (18, 35607040), (20, 32046336), (21, 30520320), (24, 26705280), (28, 22890240), (30, 21364224), (32, 20028960), (35, 18312192), (36, 17803520), (40, 16023168), (42, 15260160), (45, 14242816), (48, 13352640), (56, 11445120), (60, 10682112), (63, 10173440), (64, 10014480), (70, 9156096), (72, 8901760), (80, 8011584), (84, 7630080), (90, 7121408), (96, 6676320), (105, 6104064), (112, 5722560), (120, 5341056), (126, 5086720), (128, 5007240), (140, 4578048), (144, 4450880), (160, 4005792), (168, 3815040), (180, 3560704), (192, 3338160), (210, 3052032), (224, 2861280), (240, 2670528), (252, 2543360), (256, 2503620), (280, 2289024), (288, 2225440), (315, 2034688), (320, 2002896), (336, 1907520), (360, 1780352), (384, 1669080), (420, 1526016), (448, 1430640), (480, 1335264), (504, 1271680), (512, 1251810), (560, 1144512), (576, 1112720), (630, 1017344), (640, 1001448), (672, 953760), (720, 890176), (768, 834540), (840, 763008), (896, 715320), (960, 667632), (1008, 635840), (1024, 625905), (1120, 572256), (1152, 556360), (1260, 508672), (1280, 500724), (1344, 476880), (1440, 445088), (1536, 417270), (1680, 381504), (1792, 357660), (1920, 333816), (1987, 322560), (2016, 317920), (2240, 286128), (2304, 278180), (2520, 254336), (2560, 250362), (2688, 238440), (2880, 222544), (3072, 208635), (3360, 190752), (3584, 178830), (3840, 166908), (3974, 161280), (4032, 158960), (4480, 143064), (4608, 139090), (5040, 127168), (5120, 125181), (5376, 119220), (5760, 111272), (5961, 107520), (6720, 95376), (7168, 89415), (7680, 83454), (7948, 80640), (8064, 79480), (8960, 71532), (9216, 69545), (9935, 64512), (10080, 63584), (10752, 59610), (11520, 55636), (11922, 53760), (13440, 47688), (13909, 46080), (15360, 41727), (15896, 40320), (16128, 39740), (17883, 35840), (17920, 35766), (19870, 32256), (20160, 31792), (21504, 29805), (23040, 27818), (23844, 26880)]