256999680

素因数分解:

$2^8\times 3^2\times 5^1\times 7^1\times {\mathrm{3187}}^1$

素因数の和:3221

約数の個数: 216

約数和(自身を含む): 1016538432

約数和(自身を除く): 759538752

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, 3187, 3360, 3840, 4032, 4480, 5040, 5376, 5760, 6374, 6720, 8064, 8960, 9561, 10080, 11520, 12748, 13440, 15935, 16128, 19122, 20160, 22309, 25496, 26880, 28683, 31870, 38244, 40320, 44618, 47805, 50992, 57366, 63740, 66927, 76488, 80640, 89236, 95610, 101984, 111545, 114732, 127480, 133854, 143415, 152976, 178472, 191220, 200781, 203968, 223090, 229464, 254960, 267708, 286830, 305952, 334635, 356944, 382440, 401562, 407936, 446180, 458928, 509920, 535416, 573660, 611904, 669270, 713888, 764880, 803124, 815872, 892360, 917856, 1003905, 1019840, 1070832, 1147320, 1223808, 1338540, 1427776, 1529760, 1606248, 1784720, 1835712, 2007810, 2039680, 2141664, 2294640, 2447616, 2677080, 2855552, 3059520, 3212496, 3569440, 3671424, 4015620, 4079360, 4283328, 4589280, 5354160, 5711104, 6119040, 6424992, 7138880, 7342848, 8031240, 8566656, 9178560, 10708320, 12238080, 12849984, 14277760, 16062480, 17133312, 18357120, 21416640, 25699968, 28555520, 32124960, 36714240, 42833280, 51399936, 64249920, 85666560, 128499840, 256999680]

約数ペア:

[(1, 256999680), (2, 128499840), (3, 85666560), (4, 64249920), (5, 51399936), (6, 42833280), (7, 36714240), (8, 32124960), (9, 28555520), (10, 25699968), (12, 21416640), (14, 18357120), (15, 17133312), (16, 16062480), (18, 14277760), (20, 12849984), (21, 12238080), (24, 10708320), (28, 9178560), (30, 8566656), (32, 8031240), (35, 7342848), (36, 7138880), (40, 6424992), (42, 6119040), (45, 5711104), (48, 5354160), (56, 4589280), (60, 4283328), (63, 4079360), (64, 4015620), (70, 3671424), (72, 3569440), (80, 3212496), (84, 3059520), (90, 2855552), (96, 2677080), (105, 2447616), (112, 2294640), (120, 2141664), (126, 2039680), (128, 2007810), (140, 1835712), (144, 1784720), (160, 1606248), (168, 1529760), (180, 1427776), (192, 1338540), (210, 1223808), (224, 1147320), (240, 1070832), (252, 1019840), (256, 1003905), (280, 917856), (288, 892360), (315, 815872), (320, 803124), (336, 764880), (360, 713888), (384, 669270), (420, 611904), (448, 573660), (480, 535416), (504, 509920), (560, 458928), (576, 446180), (630, 407936), (640, 401562), (672, 382440), (720, 356944), (768, 334635), (840, 305952), (896, 286830), (960, 267708), (1008, 254960), (1120, 229464), (1152, 223090), (1260, 203968), (1280, 200781), (1344, 191220), (1440, 178472), (1680, 152976), (1792, 143415), (1920, 133854), (2016, 127480), (2240, 114732), (2304, 111545), (2520, 101984), (2688, 95610), (2880, 89236), (3187, 80640), (3360, 76488), (3840, 66927), (4032, 63740), (4480, 57366), (5040, 50992), (5376, 47805), (5760, 44618), (6374, 40320), (6720, 38244), (8064, 31870), (8960, 28683), (9561, 26880), (10080, 25496), (11520, 22309), (12748, 20160), (13440, 19122), (15935, 16128)]