21189400

素因数分解:

$2^3\times 5^2\times {\mathrm{53}}^1\times {\mathrm{1999}}^1$

素因数の和:2068

約数の個数: 48

約数和(自身を含む): 50220000

約数和(自身を除く): 29030600

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 53, 100, 106, 200, 212, 265, 424, 530, 1060, 1325, 1999, 2120, 2650, 3998, 5300, 7996, 9995, 10600, 15992, 19990, 39980, 49975, 79960, 99950, 105947, 199900, 211894, 399800, 423788, 529735, 847576, 1059470, 2118940, 2648675, 4237880, 5297350, 10594700, 21189400]

約数ペア:

[(1, 21189400), (2, 10594700), (4, 5297350), (5, 4237880), (8, 2648675), (10, 2118940), (20, 1059470), (25, 847576), (40, 529735), (50, 423788), (53, 399800), (100, 211894), (106, 199900), (200, 105947), (212, 99950), (265, 79960), (424, 49975), (530, 39980), (1060, 19990), (1325, 15992), (1999, 10600), (2120, 9995), (2650, 7996), (3998, 5300)]