81512480

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{281}}^1$

素因数の和:347

約数の個数: 144

約数和(自身を含む): 230886936

約数和(自身を除く): 149374456

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 37, 40, 49, 56, 70, 74, 80, 98, 112, 140, 148, 160, 185, 196, 224, 245, 259, 280, 281, 296, 370, 392, 490, 518, 560, 562, 592, 740, 784, 980, 1036, 1120, 1124, 1184, 1295, 1405, 1480, 1568, 1813, 1960, 1967, 2072, 2248, 2590, 2810, 2960, 3626, 3920, 3934, 4144, 4496, 5180, 5620, 5920, 7252, 7840, 7868, 8288, 8992, 9065, 9835, 10360, 10397, 11240, 13769, 14504, 15736, 18130, 19670, 20720, 20794, 22480, 27538, 29008, 31472, 36260, 39340, 41440, 41588, 44960, 51985, 55076, 58016, 62944, 68845, 72520, 72779, 78680, 83176, 103970, 110152, 137690, 145040, 145558, 157360, 166352, 207940, 220304, 275380, 290080, 291116, 314720, 332704, 363895, 415880, 440608, 509453, 550760, 582232, 727790, 831760, 1018906, 1101520, 1164464, 1455580, 1663520, 2037812, 2203040, 2328928, 2547265, 2911160, 4075624, 5094530, 5822320, 8151248, 10189060, 11644640, 16302496, 20378120, 40756240, 81512480]

約数ペア:

[(1, 81512480), (2, 40756240), (4, 20378120), (5, 16302496), (7, 11644640), (8, 10189060), (10, 8151248), (14, 5822320), (16, 5094530), (20, 4075624), (28, 2911160), (32, 2547265), (35, 2328928), (37, 2203040), (40, 2037812), (49, 1663520), (56, 1455580), (70, 1164464), (74, 1101520), (80, 1018906), (98, 831760), (112, 727790), (140, 582232), (148, 550760), (160, 509453), (185, 440608), (196, 415880), (224, 363895), (245, 332704), (259, 314720), (280, 291116), (281, 290080), (296, 275380), (370, 220304), (392, 207940), (490, 166352), (518, 157360), (560, 145558), (562, 145040), (592, 137690), (740, 110152), (784, 103970), (980, 83176), (1036, 78680), (1120, 72779), (1124, 72520), (1184, 68845), (1295, 62944), (1405, 58016), (1480, 55076), (1568, 51985), (1813, 44960), (1960, 41588), (1967, 41440), (2072, 39340), (2248, 36260), (2590, 31472), (2810, 29008), (2960, 27538), (3626, 22480), (3920, 20794), (3934, 20720), (4144, 19670), (4496, 18130), (5180, 15736), (5620, 14504), (5920, 13769), (7252, 11240), (7840, 10397), (7868, 10360), (8288, 9835), (8992, 9065)]