20787840

素因数分解:

$2^7\times 3^4\times 5^1\times {\mathrm{401}}^1$

素因数の和:432

約数の個数: 160

約数和(自身を含む): 74422260

約数和(自身を除く): 53634420

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 32, 36, 40, 45, 48, 54, 60, 64, 72, 80, 81, 90, 96, 108, 120, 128, 135, 144, 160, 162, 180, 192, 216, 240, 270, 288, 320, 324, 360, 384, 401, 405, 432, 480, 540, 576, 640, 648, 720, 802, 810, 864, 960, 1080, 1152, 1203, 1296, 1440, 1604, 1620, 1728, 1920, 2005, 2160, 2406, 2592, 2880, 3208, 3240, 3456, 3609, 4010, 4320, 4812, 5184, 5760, 6015, 6416, 6480, 7218, 8020, 8640, 9624, 10368, 10827, 12030, 12832, 12960, 14436, 16040, 17280, 18045, 19248, 21654, 24060, 25664, 25920, 28872, 32080, 32481, 36090, 38496, 43308, 48120, 51328, 51840, 54135, 57744, 64160, 64962, 72180, 76992, 86616, 96240, 108270, 115488, 128320, 129924, 144360, 153984, 162405, 173232, 192480, 216540, 230976, 256640, 259848, 288720, 324810, 346464, 384960, 433080, 461952, 519696, 577440, 649620, 692928, 769920, 866160, 1039392, 1154880, 1299240, 1385856, 1732320, 2078784, 2309760, 2598480, 3464640, 4157568, 5196960, 6929280, 10393920, 20787840]

約数ペア:

[(1, 20787840), (2, 10393920), (3, 6929280), (4, 5196960), (5, 4157568), (6, 3464640), (8, 2598480), (9, 2309760), (10, 2078784), (12, 1732320), (15, 1385856), (16, 1299240), (18, 1154880), (20, 1039392), (24, 866160), (27, 769920), (30, 692928), (32, 649620), (36, 577440), (40, 519696), (45, 461952), (48, 433080), (54, 384960), (60, 346464), (64, 324810), (72, 288720), (80, 259848), (81, 256640), (90, 230976), (96, 216540), (108, 192480), (120, 173232), (128, 162405), (135, 153984), (144, 144360), (160, 129924), (162, 128320), (180, 115488), (192, 108270), (216, 96240), (240, 86616), (270, 76992), (288, 72180), (320, 64962), (324, 64160), (360, 57744), (384, 54135), (401, 51840), (405, 51328), (432, 48120), (480, 43308), (540, 38496), (576, 36090), (640, 32481), (648, 32080), (720, 28872), (802, 25920), (810, 25664), (864, 24060), (960, 21654), (1080, 19248), (1152, 18045), (1203, 17280), (1296, 16040), (1440, 14436), (1604, 12960), (1620, 12832), (1728, 12030), (1920, 10827), (2005, 10368), (2160, 9624), (2406, 8640), (2592, 8020), (2880, 7218), (3208, 6480), (3240, 6416), (3456, 6015), (3609, 5760), (4010, 5184), (4320, 4812)]