81743760

素因数分解:

$2^4\times 3^2\times 5^1\times 7^3\times {\mathrm{331}}^1$

素因数の和:371

約数の個数: 240

約数和(自身を含む): 321110400

約数和(自身を除く): 239366640

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 35, 36, 40, 42, 45, 48, 49, 56, 60, 63, 70, 72, 80, 84, 90, 98, 105, 112, 120, 126, 140, 144, 147, 168, 180, 196, 210, 240, 245, 252, 280, 294, 315, 331, 336, 343, 360, 392, 420, 441, 490, 504, 560, 588, 630, 662, 686, 720, 735, 784, 840, 882, 980, 993, 1008, 1029, 1176, 1260, 1324, 1372, 1470, 1655, 1680, 1715, 1764, 1960, 1986, 2058, 2205, 2317, 2352, 2520, 2648, 2744, 2940, 2979, 3087, 3310, 3430, 3528, 3920, 3972, 4116, 4410, 4634, 4965, 5040, 5145, 5296, 5488, 5880, 5958, 6174, 6620, 6860, 6951, 7056, 7944, 8232, 8820, 9268, 9930, 10290, 11585, 11760, 11916, 12348, 13240, 13720, 13902, 14895, 15435, 15888, 16219, 16464, 17640, 18536, 19860, 20580, 20853, 23170, 23832, 24696, 26480, 27440, 27804, 29790, 30870, 32438, 34755, 35280, 37072, 39720, 41160, 41706, 46340, 47664, 48657, 49392, 55608, 59580, 61740, 64876, 69510, 79440, 81095, 82320, 83412, 92680, 97314, 104265, 111216, 113533, 119160, 123480, 129752, 139020, 145971, 162190, 166824, 185360, 194628, 208530, 227066, 238320, 243285, 246960, 259504, 278040, 291942, 324380, 333648, 340599, 389256, 417060, 454132, 486570, 556080, 567665, 583884, 648760, 681198, 729855, 778512, 834120, 908264, 973140, 1021797, 1135330, 1167768, 1297520, 1362396, 1459710, 1668240, 1702995, 1816528, 1946280, 2043594, 2270660, 2335536, 2724792, 2919420, 3405990, 3892560, 4087188, 4541320, 5108985, 5449584, 5838840, 6811980, 8174376, 9082640, 10217970, 11677680, 13623960, 16348752, 20435940, 27247920, 40871880, 81743760]

約数ペア:

[(1, 81743760), (2, 40871880), (3, 27247920), (4, 20435940), (5, 16348752), (6, 13623960), (7, 11677680), (8, 10217970), (9, 9082640), (10, 8174376), (12, 6811980), (14, 5838840), (15, 5449584), (16, 5108985), (18, 4541320), (20, 4087188), (21, 3892560), (24, 3405990), (28, 2919420), (30, 2724792), (35, 2335536), (36, 2270660), (40, 2043594), (42, 1946280), (45, 1816528), (48, 1702995), (49, 1668240), (56, 1459710), (60, 1362396), (63, 1297520), (70, 1167768), (72, 1135330), (80, 1021797), (84, 973140), (90, 908264), (98, 834120), (105, 778512), (112, 729855), (120, 681198), (126, 648760), (140, 583884), (144, 567665), (147, 556080), (168, 486570), (180, 454132), (196, 417060), (210, 389256), (240, 340599), (245, 333648), (252, 324380), (280, 291942), (294, 278040), (315, 259504), (331, 246960), (336, 243285), (343, 238320), (360, 227066), (392, 208530), (420, 194628), (441, 185360), (490, 166824), (504, 162190), (560, 145971), (588, 139020), (630, 129752), (662, 123480), (686, 119160), (720, 113533), (735, 111216), (784, 104265), (840, 97314), (882, 92680), (980, 83412), (993, 82320), (1008, 81095), (1029, 79440), (1176, 69510), (1260, 64876), (1324, 61740), (1372, 59580), (1470, 55608), (1655, 49392), (1680, 48657), (1715, 47664), (1764, 46340), (1960, 41706), (1986, 41160), (2058, 39720), (2205, 37072), (2317, 35280), (2352, 34755), (2520, 32438), (2648, 30870), (2744, 29790), (2940, 27804), (2979, 27440), (3087, 26480), (3310, 24696), (3430, 23832), (3528, 23170), (3920, 20853), (3972, 20580), (4116, 19860), (4410, 18536), (4634, 17640), (4965, 16464), (5040, 16219), (5145, 15888), (5296, 15435), (5488, 14895), (5880, 13902), (5958, 13720), (6174, 13240), (6620, 12348), (6860, 11916), (6951, 11760), (7056, 11585), (7944, 10290), (8232, 9930), (8820, 9268)]