640039680

素因数分解:

$2^8\times 3^2\times 5^1\times 7^1\times {\mathrm{7937}}^1$

素因数の和:7971

約数の個数: 216

約数和(自身を含む): 2531142432

約数和(自身を除く): 1891102752

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, 560, 576, 630, 640, 672, 720, 768, 840, 896, 960, 1008, 1120, 1152, 1260, 1280, 1344, 1440, 1680, 1792, 1920, 2016, 2240, 2304, 2520, 2688, 2880, 3360, 3840, 4032, 4480, 5040, 5376, 5760, 6720, 7937, 8064, 8960, 10080, 11520, 13440, 15874, 16128, 20160, 23811, 26880, 31748, 39685, 40320, 47622, 55559, 63496, 71433, 79370, 80640, 95244, 111118, 119055, 126992, 142866, 158740, 166677, 190488, 222236, 238110, 253984, 277795, 285732, 317480, 333354, 357165, 380976, 444472, 476220, 500031, 507968, 555590, 571464, 634960, 666708, 714330, 761952, 833385, 888944, 952440, 1000062, 1015936, 1111180, 1142928, 1269920, 1333416, 1428660, 1523904, 1666770, 1777888, 1904880, 2000124, 2031872, 2222360, 2285856, 2500155, 2539840, 2666832, 2857320, 3047808, 3333540, 3555776, 3809760, 4000248, 4444720, 4571712, 5000310, 5079680, 5333664, 5714640, 6095616, 6667080, 7111552, 7619520, 8000496, 8889440, 9143424, 10000620, 10159360, 10667328, 11429280, 13334160, 14223104, 15239040, 16000992, 17778880, 18286848, 20001240, 21334656, 22858560, 26668320, 30478080, 32001984, 35557760, 40002480, 42669312, 45717120, 53336640, 64003968, 71115520, 80004960, 91434240, 106673280, 128007936, 160009920, 213346560, 320019840, 640039680]

約数ペア:

[(1, 640039680), (2, 320019840), (3, 213346560), (4, 160009920), (5, 128007936), (6, 106673280), (7, 91434240), (8, 80004960), (9, 71115520), (10, 64003968), (12, 53336640), (14, 45717120), (15, 42669312), (16, 40002480), (18, 35557760), (20, 32001984), (21, 30478080), (24, 26668320), (28, 22858560), (30, 21334656), (32, 20001240), (35, 18286848), (36, 17778880), (40, 16000992), (42, 15239040), (45, 14223104), (48, 13334160), (56, 11429280), (60, 10667328), (63, 10159360), (64, 10000620), (70, 9143424), (72, 8889440), (80, 8000496), (84, 7619520), (90, 7111552), (96, 6667080), (105, 6095616), (112, 5714640), (120, 5333664), (126, 5079680), (128, 5000310), (140, 4571712), (144, 4444720), (160, 4000248), (168, 3809760), (180, 3555776), (192, 3333540), (210, 3047808), (224, 2857320), (240, 2666832), (252, 2539840), (256, 2500155), (280, 2285856), (288, 2222360), (315, 2031872), (320, 2000124), (336, 1904880), (360, 1777888), (384, 1666770), (420, 1523904), (448, 1428660), (480, 1333416), (504, 1269920), (560, 1142928), (576, 1111180), (630, 1015936), (640, 1000062), (672, 952440), (720, 888944), (768, 833385), (840, 761952), (896, 714330), (960, 666708), (1008, 634960), (1120, 571464), (1152, 555590), (1260, 507968), (1280, 500031), (1344, 476220), (1440, 444472), (1680, 380976), (1792, 357165), (1920, 333354), (2016, 317480), (2240, 285732), (2304, 277795), (2520, 253984), (2688, 238110), (2880, 222236), (3360, 190488), (3840, 166677), (4032, 158740), (4480, 142866), (5040, 126992), (5376, 119055), (5760, 111118), (6720, 95244), (7937, 80640), (8064, 79370), (8960, 71433), (10080, 63496), (11520, 55559), (13440, 47622), (15874, 40320), (16128, 39685), (20160, 31748), (23811, 26880)]