640177920

素因数分解:

$2^8\times 3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{911}}^1$

素因数の和:999

約数の個数: 216

約数和(自身を含む): 2253730752

約数和(自身を除く): 1613552832

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 60, 61, 64, 72, 80, 90, 96, 120, 122, 128, 144, 160, 180, 183, 192, 240, 244, 256, 288, 305, 320, 360, 366, 384, 480, 488, 549, 576, 610, 640, 720, 732, 768, 911, 915, 960, 976, 1098, 1152, 1220, 1280, 1440, 1464, 1822, 1830, 1920, 1952, 2196, 2304, 2440, 2733, 2745, 2880, 2928, 3644, 3660, 3840, 3904, 4392, 4555, 4880, 5466, 5490, 5760, 5856, 7288, 7320, 7808, 8199, 8784, 9110, 9760, 10932, 10980, 11520, 11712, 13665, 14576, 14640, 15616, 16398, 17568, 18220, 19520, 21864, 21960, 23424, 27330, 29152, 29280, 32796, 35136, 36440, 39040, 40995, 43728, 43920, 46848, 54660, 55571, 58304, 58560, 65592, 70272, 72880, 78080, 81990, 87456, 87840, 109320, 111142, 116608, 117120, 131184, 140544, 145760, 163980, 166713, 174912, 175680, 218640, 222284, 233216, 234240, 262368, 277855, 291520, 327960, 333426, 349824, 351360, 437280, 444568, 500139, 524736, 555710, 583040, 655920, 666852, 699648, 702720, 833565, 874560, 889136, 1000278, 1049472, 1111420, 1166080, 1311840, 1333704, 1667130, 1749120, 1778272, 2000556, 2098944, 2222840, 2500695, 2623680, 2667408, 3334260, 3498240, 3556544, 4001112, 4445680, 5001390, 5247360, 5334816, 6668520, 7113088, 8002224, 8891360, 10002780, 10494720, 10669632, 13337040, 14226176, 16004448, 17782720, 20005560, 21339264, 26674080, 32008896, 35565440, 40011120, 42678528, 53348160, 64017792, 71130880, 80022240, 106696320, 128035584, 160044480, 213392640, 320088960, 640177920]

約数ペア:

[(1, 640177920), (2, 320088960), (3, 213392640), (4, 160044480), (5, 128035584), (6, 106696320), (8, 80022240), (9, 71130880), (10, 64017792), (12, 53348160), (15, 42678528), (16, 40011120), (18, 35565440), (20, 32008896), (24, 26674080), (30, 21339264), (32, 20005560), (36, 17782720), (40, 16004448), (45, 14226176), (48, 13337040), (60, 10669632), (61, 10494720), (64, 10002780), (72, 8891360), (80, 8002224), (90, 7113088), (96, 6668520), (120, 5334816), (122, 5247360), (128, 5001390), (144, 4445680), (160, 4001112), (180, 3556544), (183, 3498240), (192, 3334260), (240, 2667408), (244, 2623680), (256, 2500695), (288, 2222840), (305, 2098944), (320, 2000556), (360, 1778272), (366, 1749120), (384, 1667130), (480, 1333704), (488, 1311840), (549, 1166080), (576, 1111420), (610, 1049472), (640, 1000278), (720, 889136), (732, 874560), (768, 833565), (911, 702720), (915, 699648), (960, 666852), (976, 655920), (1098, 583040), (1152, 555710), (1220, 524736), (1280, 500139), (1440, 444568), (1464, 437280), (1822, 351360), (1830, 349824), (1920, 333426), (1952, 327960), (2196, 291520), (2304, 277855), (2440, 262368), (2733, 234240), (2745, 233216), (2880, 222284), (2928, 218640), (3644, 175680), (3660, 174912), (3840, 166713), (3904, 163980), (4392, 145760), (4555, 140544), (4880, 131184), (5466, 117120), (5490, 116608), (5760, 111142), (5856, 109320), (7288, 87840), (7320, 87456), (7808, 81990), (8199, 78080), (8784, 72880), (9110, 70272), (9760, 65592), (10932, 58560), (10980, 58304), (11520, 55571), (11712, 54660), (13665, 46848), (14576, 43920), (14640, 43728), (15616, 40995), (16398, 39040), (17568, 36440), (18220, 35136), (19520, 32796), (21864, 29280), (21960, 29152), (23424, 27330)]