81581640

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{197}}^1$

素因数の和:264

約数の個数: 256

約数和(自身を含む): 307929600

約数和(自身を除く): 226347960

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 17, 20, 21, 24, 28, 29, 30, 34, 35, 40, 42, 51, 56, 58, 60, 68, 70, 84, 85, 87, 102, 105, 116, 119, 120, 136, 140, 145, 168, 170, 174, 197, 203, 204, 210, 232, 238, 255, 280, 290, 340, 348, 357, 394, 406, 408, 420, 435, 476, 493, 510, 580, 591, 595, 609, 680, 696, 714, 788, 812, 840, 870, 952, 985, 986, 1015, 1020, 1160, 1182, 1190, 1218, 1379, 1428, 1479, 1576, 1624, 1740, 1785, 1970, 1972, 2030, 2040, 2364, 2380, 2436, 2465, 2758, 2856, 2955, 2958, 3045, 3349, 3451, 3480, 3570, 3940, 3944, 4060, 4137, 4728, 4760, 4872, 4930, 5516, 5713, 5910, 5916, 6090, 6698, 6895, 6902, 7140, 7395, 7880, 8120, 8274, 9860, 10047, 10353, 11032, 11426, 11820, 11832, 12180, 13396, 13790, 13804, 14280, 14790, 16548, 16745, 17139, 17255, 19720, 20094, 20685, 20706, 22852, 23443, 23640, 24360, 26792, 27580, 27608, 28565, 29580, 33096, 33490, 34278, 34510, 39991, 40188, 41370, 41412, 45704, 46886, 50235, 51765, 55160, 57130, 59160, 66980, 68556, 69020, 70329, 79982, 80376, 82740, 82824, 85695, 93772, 97121, 100470, 103530, 114260, 117215, 119973, 133960, 137112, 138040, 140658, 159964, 165480, 171390, 187544, 194242, 199955, 200940, 207060, 228520, 234430, 239946, 281316, 291363, 319928, 342780, 351645, 388484, 399910, 401880, 414120, 468860, 479892, 485605, 562632, 582726, 599865, 679847, 685560, 703290, 776968, 799820, 937720, 959784, 971210, 1165452, 1199730, 1359694, 1406580, 1456815, 1599640, 1942420, 2039541, 2330904, 2399460, 2719388, 2813160, 2913630, 3399235, 3884840, 4079082, 4798920, 5438776, 5827260, 6798470, 8158164, 10197705, 11654520, 13596940, 16316328, 20395410, 27193880, 40790820, 81581640]

約数ペア:

[(1, 81581640), (2, 40790820), (3, 27193880), (4, 20395410), (5, 16316328), (6, 13596940), (7, 11654520), (8, 10197705), (10, 8158164), (12, 6798470), (14, 5827260), (15, 5438776), (17, 4798920), (20, 4079082), (21, 3884840), (24, 3399235), (28, 2913630), (29, 2813160), (30, 2719388), (34, 2399460), (35, 2330904), (40, 2039541), (42, 1942420), (51, 1599640), (56, 1456815), (58, 1406580), (60, 1359694), (68, 1199730), (70, 1165452), (84, 971210), (85, 959784), (87, 937720), (102, 799820), (105, 776968), (116, 703290), (119, 685560), (120, 679847), (136, 599865), (140, 582726), (145, 562632), (168, 485605), (170, 479892), (174, 468860), (197, 414120), (203, 401880), (204, 399910), (210, 388484), (232, 351645), (238, 342780), (255, 319928), (280, 291363), (290, 281316), (340, 239946), (348, 234430), (357, 228520), (394, 207060), (406, 200940), (408, 199955), (420, 194242), (435, 187544), (476, 171390), (493, 165480), (510, 159964), (580, 140658), (591, 138040), (595, 137112), (609, 133960), (680, 119973), (696, 117215), (714, 114260), (788, 103530), (812, 100470), (840, 97121), (870, 93772), (952, 85695), (985, 82824), (986, 82740), (1015, 80376), (1020, 79982), (1160, 70329), (1182, 69020), (1190, 68556), (1218, 66980), (1379, 59160), (1428, 57130), (1479, 55160), (1576, 51765), (1624, 50235), (1740, 46886), (1785, 45704), (1970, 41412), (1972, 41370), (2030, 40188), (2040, 39991), (2364, 34510), (2380, 34278), (2436, 33490), (2465, 33096), (2758, 29580), (2856, 28565), (2955, 27608), (2958, 27580), (3045, 26792), (3349, 24360), (3451, 23640), (3480, 23443), (3570, 22852), (3940, 20706), (3944, 20685), (4060, 20094), (4137, 19720), (4728, 17255), (4760, 17139), (4872, 16745), (4930, 16548), (5516, 14790), (5713, 14280), (5910, 13804), (5916, 13790), (6090, 13396), (6698, 12180), (6895, 11832), (6902, 11820), (7140, 11426), (7395, 11032), (7880, 10353), (8120, 10047), (8274, 9860)]