81657720

素因数分解:

$2^3\times 3^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{271}}^1$

素因数の和:328

約数の個数: 192

約数和(自身を含む): 285143040

約数和(自身を除く): 203485320

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 31, 36, 40, 45, 54, 60, 62, 72, 81, 90, 93, 108, 120, 124, 135, 155, 162, 180, 186, 216, 243, 248, 270, 271, 279, 310, 324, 360, 372, 405, 465, 486, 540, 542, 558, 620, 648, 744, 810, 813, 837, 930, 972, 1080, 1084, 1116, 1215, 1240, 1355, 1395, 1620, 1626, 1674, 1860, 1944, 2168, 2232, 2430, 2439, 2511, 2710, 2790, 3240, 3252, 3348, 3720, 4065, 4185, 4860, 4878, 5022, 5420, 5580, 6504, 6696, 7317, 7533, 8130, 8370, 8401, 9720, 9756, 10044, 10840, 11160, 12195, 12555, 14634, 15066, 16260, 16740, 16802, 19512, 20088, 21951, 24390, 25110, 25203, 29268, 30132, 32520, 33480, 33604, 36585, 37665, 42005, 43902, 48780, 50220, 50406, 58536, 60264, 65853, 67208, 73170, 75330, 75609, 84010, 87804, 97560, 100440, 100812, 109755, 126015, 131706, 146340, 150660, 151218, 168020, 175608, 201624, 219510, 226827, 252030, 263412, 292680, 301320, 302436, 329265, 336040, 378045, 439020, 453654, 504060, 526824, 604872, 658530, 680481, 756090, 878040, 907308, 1008120, 1134135, 1317060, 1360962, 1512180, 1814616, 2041443, 2268270, 2634120, 2721924, 3024360, 3402405, 4082886, 4536540, 5443848, 6804810, 8165772, 9073080, 10207215, 13609620, 16331544, 20414430, 27219240, 40828860, 81657720]

約数ペア:

[(1, 81657720), (2, 40828860), (3, 27219240), (4, 20414430), (5, 16331544), (6, 13609620), (8, 10207215), (9, 9073080), (10, 8165772), (12, 6804810), (15, 5443848), (18, 4536540), (20, 4082886), (24, 3402405), (27, 3024360), (30, 2721924), (31, 2634120), (36, 2268270), (40, 2041443), (45, 1814616), (54, 1512180), (60, 1360962), (62, 1317060), (72, 1134135), (81, 1008120), (90, 907308), (93, 878040), (108, 756090), (120, 680481), (124, 658530), (135, 604872), (155, 526824), (162, 504060), (180, 453654), (186, 439020), (216, 378045), (243, 336040), (248, 329265), (270, 302436), (271, 301320), (279, 292680), (310, 263412), (324, 252030), (360, 226827), (372, 219510), (405, 201624), (465, 175608), (486, 168020), (540, 151218), (542, 150660), (558, 146340), (620, 131706), (648, 126015), (744, 109755), (810, 100812), (813, 100440), (837, 97560), (930, 87804), (972, 84010), (1080, 75609), (1084, 75330), (1116, 73170), (1215, 67208), (1240, 65853), (1355, 60264), (1395, 58536), (1620, 50406), (1626, 50220), (1674, 48780), (1860, 43902), (1944, 42005), (2168, 37665), (2232, 36585), (2430, 33604), (2439, 33480), (2511, 32520), (2710, 30132), (2790, 29268), (3240, 25203), (3252, 25110), (3348, 24390), (3720, 21951), (4065, 20088), (4185, 19512), (4860, 16802), (4878, 16740), (5022, 16260), (5420, 15066), (5580, 14634), (6504, 12555), (6696, 12195), (7317, 11160), (7533, 10840), (8130, 10044), (8370, 9756), (8401, 9720)]