21499600

素因数分解:

$2^4\times 5^2\times {\mathrm{59}}^1\times {\mathrm{911}}^1$

素因数の和:988

約数の個数: 60

約数和(自身を含む): 52585920

約数和(自身を除く): 31086320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 59, 80, 100, 118, 200, 236, 295, 400, 472, 590, 911, 944, 1180, 1475, 1822, 2360, 2950, 3644, 4555, 4720, 5900, 7288, 9110, 11800, 14576, 18220, 22775, 23600, 36440, 45550, 53749, 72880, 91100, 107498, 182200, 214996, 268745, 364400, 429992, 537490, 859984, 1074980, 1343725, 2149960, 2687450, 4299920, 5374900, 10749800, 21499600]

約数ペア:

[(1, 21499600), (2, 10749800), (4, 5374900), (5, 4299920), (8, 2687450), (10, 2149960), (16, 1343725), (20, 1074980), (25, 859984), (40, 537490), (50, 429992), (59, 364400), (80, 268745), (100, 214996), (118, 182200), (200, 107498), (236, 91100), (295, 72880), (400, 53749), (472, 45550), (590, 36440), (911, 23600), (944, 22775), (1180, 18220), (1475, 14576), (1822, 11800), (2360, 9110), (2950, 7288), (3644, 5900), (4555, 4720)]