19997520

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{97}}^1\times {\mathrm{859}}^1$

素因数の和:972

約数の個数: 80

約数和(自身を含む): 62704320

約数和(自身を除く): 42706800

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 97, 120, 194, 240, 291, 388, 485, 582, 776, 859, 970, 1164, 1455, 1552, 1718, 1940, 2328, 2577, 2910, 3436, 3880, 4295, 4656, 5154, 5820, 6872, 7760, 8590, 10308, 11640, 12885, 13744, 17180, 20616, 23280, 25770, 34360, 41232, 51540, 68720, 83323, 103080, 166646, 206160, 249969, 333292, 416615, 499938, 666584, 833230, 999876, 1249845, 1333168, 1666460, 1999752, 2499690, 3332920, 3999504, 4999380, 6665840, 9998760, 19997520]

約数ペア:

[(1, 19997520), (2, 9998760), (3, 6665840), (4, 4999380), (5, 3999504), (6, 3332920), (8, 2499690), (10, 1999752), (12, 1666460), (15, 1333168), (16, 1249845), (20, 999876), (24, 833230), (30, 666584), (40, 499938), (48, 416615), (60, 333292), (80, 249969), (97, 206160), (120, 166646), (194, 103080), (240, 83323), (291, 68720), (388, 51540), (485, 41232), (582, 34360), (776, 25770), (859, 23280), (970, 20616), (1164, 17180), (1455, 13744), (1552, 12885), (1718, 11640), (1940, 10308), (2328, 8590), (2577, 7760), (2910, 6872), (3436, 5820), (3880, 5154), (4295, 4656)]