640247040

素因数分解:

$2^8\times 3^2\times 5^1\times {\mathrm{149}}^1\times {\mathrm{373}}^1$

素因数の和:549

約数の個数: 216

約数和(自身を含む): 2236033800

約数和(自身を除く): 1595786760

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, 64, 72, 80, 90, 96, 120, 128, 144, 149, 160, 180, 192, 240, 256, 288, 298, 320, 360, 373, 384, 447, 480, 576, 596, 640, 720, 745, 746, 768, 894, 960, 1119, 1152, 1192, 1280, 1341, 1440, 1490, 1492, 1788, 1865, 1920, 2235, 2238, 2304, 2384, 2682, 2880, 2980, 2984, 3357, 3576, 3730, 3840, 4470, 4476, 4768, 5364, 5595, 5760, 5960, 5968, 6705, 6714, 7152, 7460, 8940, 8952, 9536, 10728, 11190, 11520, 11920, 11936, 13410, 13428, 14304, 14920, 16785, 17880, 17904, 19072, 21456, 22380, 23840, 23872, 26820, 26856, 28608, 29840, 33570, 35760, 35808, 38144, 42912, 44760, 47680, 47744, 53640, 53712, 55577, 57216, 59680, 67140, 71520, 71616, 85824, 89520, 95360, 95488, 107280, 107424, 111154, 114432, 119360, 134280, 143040, 143232, 166731, 171648, 179040, 190720, 214560, 214848, 222308, 238720, 268560, 277885, 286080, 286464, 333462, 343296, 358080, 429120, 429696, 444616, 477440, 500193, 537120, 555770, 572160, 666924, 716160, 833655, 858240, 859392, 889232, 1000386, 1074240, 1111540, 1333848, 1432320, 1667310, 1716480, 1778464, 2000772, 2148480, 2223080, 2500965, 2667696, 3334620, 3556928, 4001544, 4296960, 4446160, 5001930, 5335392, 6669240, 7113856, 8003088, 8892320, 10003860, 10670784, 13338480, 14227712, 16006176, 17784640, 20007720, 21341568, 26676960, 32012352, 35569280, 40015440, 42683136, 53353920, 64024704, 71138560, 80030880, 106707840, 128049408, 160061760, 213415680, 320123520, 640247040]

約数ペア:

[(1, 640247040), (2, 320123520), (3, 213415680), (4, 160061760), (5, 128049408), (6, 106707840), (8, 80030880), (9, 71138560), (10, 64024704), (12, 53353920), (15, 42683136), (16, 40015440), (18, 35569280), (20, 32012352), (24, 26676960), (30, 21341568), (32, 20007720), (36, 17784640), (40, 16006176), (45, 14227712), (48, 13338480), (60, 10670784), (64, 10003860), (72, 8892320), (80, 8003088), (90, 7113856), (96, 6669240), (120, 5335392), (128, 5001930), (144, 4446160), (149, 4296960), (160, 4001544), (180, 3556928), (192, 3334620), (240, 2667696), (256, 2500965), (288, 2223080), (298, 2148480), (320, 2000772), (360, 1778464), (373, 1716480), (384, 1667310), (447, 1432320), (480, 1333848), (576, 1111540), (596, 1074240), (640, 1000386), (720, 889232), (745, 859392), (746, 858240), (768, 833655), (894, 716160), (960, 666924), (1119, 572160), (1152, 555770), (1192, 537120), (1280, 500193), (1341, 477440), (1440, 444616), (1490, 429696), (1492, 429120), (1788, 358080), (1865, 343296), (1920, 333462), (2235, 286464), (2238, 286080), (2304, 277885), (2384, 268560), (2682, 238720), (2880, 222308), (2980, 214848), (2984, 214560), (3357, 190720), (3576, 179040), (3730, 171648), (3840, 166731), (4470, 143232), (4476, 143040), (4768, 134280), (5364, 119360), (5595, 114432), (5760, 111154), (5960, 107424), (5968, 107280), (6705, 95488), (6714, 95360), (7152, 89520), (7460, 85824), (8940, 71616), (8952, 71520), (9536, 67140), (10728, 59680), (11190, 57216), (11520, 55577), (11920, 53712), (11936, 53640), (13410, 47744), (13428, 47680), (14304, 44760), (14920, 42912), (16785, 38144), (17880, 35808), (17904, 35760), (19072, 33570), (21456, 29840), (22380, 28608), (23840, 26856), (23872, 26820)]