21555000

素因数分解:

$2^3\times 3^2\times 5^4\times {\mathrm{479}}^1$

素因数の和:511

約数の個数: 120

約数和(自身を含む): 73101600

約数和(自身を除く): 51546600

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 25, 30, 36, 40, 45, 50, 60, 72, 75, 90, 100, 120, 125, 150, 180, 200, 225, 250, 300, 360, 375, 450, 479, 500, 600, 625, 750, 900, 958, 1000, 1125, 1250, 1437, 1500, 1800, 1875, 1916, 2250, 2395, 2500, 2874, 3000, 3750, 3832, 4311, 4500, 4790, 5000, 5625, 5748, 7185, 7500, 8622, 9000, 9580, 11250, 11496, 11975, 14370, 15000, 17244, 19160, 21555, 22500, 23950, 28740, 34488, 35925, 43110, 45000, 47900, 57480, 59875, 71850, 86220, 95800, 107775, 119750, 143700, 172440, 179625, 215550, 239500, 287400, 299375, 359250, 431100, 479000, 538875, 598750, 718500, 862200, 898125, 1077750, 1197500, 1437000, 1796250, 2155500, 2395000, 2694375, 3592500, 4311000, 5388750, 7185000, 10777500, 21555000]

約数ペア:

[(1, 21555000), (2, 10777500), (3, 7185000), (4, 5388750), (5, 4311000), (6, 3592500), (8, 2694375), (9, 2395000), (10, 2155500), (12, 1796250), (15, 1437000), (18, 1197500), (20, 1077750), (24, 898125), (25, 862200), (30, 718500), (36, 598750), (40, 538875), (45, 479000), (50, 431100), (60, 359250), (72, 299375), (75, 287400), (90, 239500), (100, 215550), (120, 179625), (125, 172440), (150, 143700), (180, 119750), (200, 107775), (225, 95800), (250, 86220), (300, 71850), (360, 59875), (375, 57480), (450, 47900), (479, 45000), (500, 43110), (600, 35925), (625, 34488), (750, 28740), (900, 23950), (958, 22500), (1000, 21555), (1125, 19160), (1250, 17244), (1437, 15000), (1500, 14370), (1800, 11975), (1875, 11496), (1916, 11250), (2250, 9580), (2395, 9000), (2500, 8622), (2874, 7500), (3000, 7185), (3750, 5748), (3832, 5625), (4311, 5000), (4500, 4790)]