21087080

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{593}}^1$

素因数の和:738

約数の個数: 64

約数和(自身を含む): 54743040

約数和(自身を除く): 33655960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 127, 140, 254, 280, 508, 593, 635, 889, 1016, 1186, 1270, 1778, 2372, 2540, 2965, 3556, 4151, 4445, 4744, 5080, 5930, 7112, 8302, 8890, 11860, 16604, 17780, 20755, 23720, 33208, 35560, 41510, 75311, 83020, 150622, 166040, 301244, 376555, 527177, 602488, 753110, 1054354, 1506220, 2108708, 2635885, 3012440, 4217416, 5271770, 10543540, 21087080]

約数ペア:

[(1, 21087080), (2, 10543540), (4, 5271770), (5, 4217416), (7, 3012440), (8, 2635885), (10, 2108708), (14, 1506220), (20, 1054354), (28, 753110), (35, 602488), (40, 527177), (56, 376555), (70, 301244), (127, 166040), (140, 150622), (254, 83020), (280, 75311), (508, 41510), (593, 35560), (635, 33208), (889, 23720), (1016, 20755), (1186, 17780), (1270, 16604), (1778, 11860), (2372, 8890), (2540, 8302), (2965, 7112), (3556, 5930), (4151, 5080), (4445, 4744)]