81405720

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{337}}^1$

素因数の和:426

約数の個数: 192

約数和(自身を含む): 294222240

約数和(自身を除く): 212816520

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 18, 20, 22, 24, 30, 33, 36, 40, 44, 45, 55, 60, 61, 66, 72, 88, 90, 99, 110, 120, 122, 132, 165, 180, 183, 198, 220, 244, 264, 305, 330, 337, 360, 366, 396, 440, 488, 495, 549, 610, 660, 671, 674, 732, 792, 915, 990, 1011, 1098, 1220, 1320, 1342, 1348, 1464, 1685, 1830, 1980, 2013, 2022, 2196, 2440, 2684, 2696, 2745, 3033, 3355, 3370, 3660, 3707, 3960, 4026, 4044, 4392, 5055, 5368, 5490, 6039, 6066, 6710, 6740, 7320, 7414, 8052, 8088, 10065, 10110, 10980, 11121, 12078, 12132, 13420, 13480, 14828, 15165, 16104, 18535, 20130, 20220, 20557, 21960, 22242, 24156, 24264, 26840, 29656, 30195, 30330, 33363, 37070, 40260, 40440, 41114, 44484, 48312, 55605, 60390, 60660, 61671, 66726, 74140, 80520, 82228, 88968, 102785, 111210, 120780, 121320, 123342, 133452, 148280, 164456, 166815, 185013, 205570, 222420, 226127, 241560, 246684, 266904, 308355, 333630, 370026, 411140, 444840, 452254, 493368, 616710, 667260, 678381, 740052, 822280, 904508, 925065, 1130635, 1233420, 1334520, 1356762, 1480104, 1809016, 1850130, 2035143, 2261270, 2466840, 2713524, 3391905, 3700260, 4070286, 4522540, 5427048, 6783810, 7400520, 8140572, 9045080, 10175715, 13567620, 16281144, 20351430, 27135240, 40702860, 81405720]

約数ペア:

[(1, 81405720), (2, 40702860), (3, 27135240), (4, 20351430), (5, 16281144), (6, 13567620), (8, 10175715), (9, 9045080), (10, 8140572), (11, 7400520), (12, 6783810), (15, 5427048), (18, 4522540), (20, 4070286), (22, 3700260), (24, 3391905), (30, 2713524), (33, 2466840), (36, 2261270), (40, 2035143), (44, 1850130), (45, 1809016), (55, 1480104), (60, 1356762), (61, 1334520), (66, 1233420), (72, 1130635), (88, 925065), (90, 904508), (99, 822280), (110, 740052), (120, 678381), (122, 667260), (132, 616710), (165, 493368), (180, 452254), (183, 444840), (198, 411140), (220, 370026), (244, 333630), (264, 308355), (305, 266904), (330, 246684), (337, 241560), (360, 226127), (366, 222420), (396, 205570), (440, 185013), (488, 166815), (495, 164456), (549, 148280), (610, 133452), (660, 123342), (671, 121320), (674, 120780), (732, 111210), (792, 102785), (915, 88968), (990, 82228), (1011, 80520), (1098, 74140), (1220, 66726), (1320, 61671), (1342, 60660), (1348, 60390), (1464, 55605), (1685, 48312), (1830, 44484), (1980, 41114), (2013, 40440), (2022, 40260), (2196, 37070), (2440, 33363), (2684, 30330), (2696, 30195), (2745, 29656), (3033, 26840), (3355, 24264), (3370, 24156), (3660, 22242), (3707, 21960), (3960, 20557), (4026, 20220), (4044, 20130), (4392, 18535), (5055, 16104), (5368, 15165), (5490, 14828), (6039, 13480), (6066, 13420), (6710, 12132), (6740, 12078), (7320, 11121), (7414, 10980), (8052, 10110), (8088, 10065)]