256515840

素因数分解:

$2^8\times 3^2\times 5^1\times 7^1\times {\mathrm{3181}}^1$

素因数の和:3215

約数の個数: 216

約数和(自身を含む): 1014625248

約数和(自身を除く): 758109408

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, 3181, 3360, 3840, 4032, 4480, 5040, 5376, 5760, 6362, 6720, 8064, 8960, 9543, 10080, 11520, 12724, 13440, 15905, 16128, 19086, 20160, 22267, 25448, 26880, 28629, 31810, 38172, 40320, 44534, 47715, 50896, 57258, 63620, 66801, 76344, 80640, 89068, 95430, 101792, 111335, 114516, 127240, 133602, 143145, 152688, 178136, 190860, 200403, 203584, 222670, 229032, 254480, 267204, 286290, 305376, 334005, 356272, 381720, 400806, 407168, 445340, 458064, 508960, 534408, 572580, 610752, 668010, 712544, 763440, 801612, 814336, 890680, 916128, 1002015, 1017920, 1068816, 1145160, 1221504, 1336020, 1425088, 1526880, 1603224, 1781360, 1832256, 2004030, 2035840, 2137632, 2290320, 2443008, 2672040, 2850176, 3053760, 3206448, 3562720, 3664512, 4008060, 4071680, 4275264, 4580640, 5344080, 5700352, 6107520, 6412896, 7125440, 7329024, 8016120, 8550528, 9161280, 10688160, 12215040, 12825792, 14250880, 16032240, 17101056, 18322560, 21376320, 25651584, 28501760, 32064480, 36645120, 42752640, 51303168, 64128960, 85505280, 128257920, 256515840]

約数ペア:

[(1, 256515840), (2, 128257920), (3, 85505280), (4, 64128960), (5, 51303168), (6, 42752640), (7, 36645120), (8, 32064480), (9, 28501760), (10, 25651584), (12, 21376320), (14, 18322560), (15, 17101056), (16, 16032240), (18, 14250880), (20, 12825792), (21, 12215040), (24, 10688160), (28, 9161280), (30, 8550528), (32, 8016120), (35, 7329024), (36, 7125440), (40, 6412896), (42, 6107520), (45, 5700352), (48, 5344080), (56, 4580640), (60, 4275264), (63, 4071680), (64, 4008060), (70, 3664512), (72, 3562720), (80, 3206448), (84, 3053760), (90, 2850176), (96, 2672040), (105, 2443008), (112, 2290320), (120, 2137632), (126, 2035840), (128, 2004030), (140, 1832256), (144, 1781360), (160, 1603224), (168, 1526880), (180, 1425088), (192, 1336020), (210, 1221504), (224, 1145160), (240, 1068816), (252, 1017920), (256, 1002015), (280, 916128), (288, 890680), (315, 814336), (320, 801612), (336, 763440), (360, 712544), (384, 668010), (420, 610752), (448, 572580), (480, 534408), (504, 508960), (560, 458064), (576, 445340), (630, 407168), (640, 400806), (672, 381720), (720, 356272), (768, 334005), (840, 305376), (896, 286290), (960, 267204), (1008, 254480), (1120, 229032), (1152, 222670), (1260, 203584), (1280, 200403), (1344, 190860), (1440, 178136), (1680, 152688), (1792, 143145), (1920, 133602), (2016, 127240), (2240, 114516), (2304, 111335), (2520, 101792), (2688, 95430), (2880, 89068), (3181, 80640), (3360, 76344), (3840, 66801), (4032, 63620), (4480, 57258), (5040, 50896), (5376, 47715), (5760, 44534), (6362, 40320), (6720, 38172), (8064, 31810), (8960, 28629), (9543, 26880), (10080, 25448), (11520, 22267), (12724, 20160), (13440, 19086), (15905, 16128)]