640557720

素因数分解:

$2^3\times 3^6\times 5^1\times {\mathrm{11}}^1\times {\mathrm{1997}}^1$

素因数の和:2037

約数の個数: 224

約数和(自身を含む): 2358519120

約数和(自身を除く): 1717961400

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 18, 20, 22, 24, 27, 30, 33, 36, 40, 44, 45, 54, 55, 60, 66, 72, 81, 88, 90, 99, 108, 110, 120, 132, 135, 162, 165, 180, 198, 216, 220, 243, 264, 270, 297, 324, 330, 360, 396, 405, 440, 486, 495, 540, 594, 648, 660, 729, 792, 810, 891, 972, 990, 1080, 1188, 1215, 1320, 1458, 1485, 1620, 1782, 1944, 1980, 1997, 2376, 2430, 2673, 2916, 2970, 3240, 3564, 3645, 3960, 3994, 4455, 4860, 5346, 5832, 5940, 5991, 7128, 7290, 7988, 8019, 8910, 9720, 9985, 10692, 11880, 11982, 13365, 14580, 15976, 16038, 17820, 17973, 19970, 21384, 21967, 23964, 26730, 29160, 29955, 32076, 35640, 35946, 39940, 40095, 43934, 47928, 53460, 53919, 59910, 64152, 65901, 71892, 79880, 80190, 87868, 89865, 106920, 107838, 109835, 119820, 131802, 143784, 160380, 161757, 175736, 179730, 197703, 215676, 219670, 239640, 263604, 269595, 320760, 323514, 329505, 359460, 395406, 431352, 439340, 485271, 527208, 539190, 593109, 647028, 659010, 718920, 790812, 808785, 878680, 970542, 988515, 1078380, 1186218, 1294056, 1318020, 1455813, 1581624, 1617570, 1779327, 1941084, 1977030, 2156760, 2372436, 2426355, 2636040, 2911626, 2965545, 3235140, 3558654, 3882168, 3954060, 4744872, 4852710, 5337981, 5823252, 5931090, 6470280, 7117308, 7279065, 7908120, 8896635, 9705420, 10675962, 11646504, 11862180, 14234616, 14558130, 16013943, 17793270, 19410840, 21351924, 23724360, 26689905, 29116260, 32027886, 35586540, 42703848, 53379810, 58232520, 64055772, 71173080, 80069715, 106759620, 128111544, 160139430, 213519240, 320278860, 640557720]

約数ペア:

[(1, 640557720), (2, 320278860), (3, 213519240), (4, 160139430), (5, 128111544), (6, 106759620), (8, 80069715), (9, 71173080), (10, 64055772), (11, 58232520), (12, 53379810), (15, 42703848), (18, 35586540), (20, 32027886), (22, 29116260), (24, 26689905), (27, 23724360), (30, 21351924), (33, 19410840), (36, 17793270), (40, 16013943), (44, 14558130), (45, 14234616), (54, 11862180), (55, 11646504), (60, 10675962), (66, 9705420), (72, 8896635), (81, 7908120), (88, 7279065), (90, 7117308), (99, 6470280), (108, 5931090), (110, 5823252), (120, 5337981), (132, 4852710), (135, 4744872), (162, 3954060), (165, 3882168), (180, 3558654), (198, 3235140), (216, 2965545), (220, 2911626), (243, 2636040), (264, 2426355), (270, 2372436), (297, 2156760), (324, 1977030), (330, 1941084), (360, 1779327), (396, 1617570), (405, 1581624), (440, 1455813), (486, 1318020), (495, 1294056), (540, 1186218), (594, 1078380), (648, 988515), (660, 970542), (729, 878680), (792, 808785), (810, 790812), (891, 718920), (972, 659010), (990, 647028), (1080, 593109), (1188, 539190), (1215, 527208), (1320, 485271), (1458, 439340), (1485, 431352), (1620, 395406), (1782, 359460), (1944, 329505), (1980, 323514), (1997, 320760), (2376, 269595), (2430, 263604), (2673, 239640), (2916, 219670), (2970, 215676), (3240, 197703), (3564, 179730), (3645, 175736), (3960, 161757), (3994, 160380), (4455, 143784), (4860, 131802), (5346, 119820), (5832, 109835), (5940, 107838), (5991, 106920), (7128, 89865), (7290, 87868), (7988, 80190), (8019, 79880), (8910, 71892), (9720, 65901), (9985, 64152), (10692, 59910), (11880, 53919), (11982, 53460), (13365, 47928), (14580, 43934), (15976, 40095), (16038, 39940), (17820, 35946), (17973, 35640), (19970, 32076), (21384, 29955), (21967, 29160), (23964, 26730)]