21921400

素因数分解:

$2^3\times 5^2\times {\mathrm{43}}^1\times {\mathrm{2549}}^1$

素因数の和:2608

約数の個数: 48

約数和(自身を含む): 52173000

約数和(自身を除く): 30251600

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 43, 50, 86, 100, 172, 200, 215, 344, 430, 860, 1075, 1720, 2150, 2549, 4300, 5098, 8600, 10196, 12745, 20392, 25490, 50980, 63725, 101960, 109607, 127450, 219214, 254900, 438428, 509800, 548035, 876856, 1096070, 2192140, 2740175, 4384280, 5480350, 10960700, 21921400]

約数ペア:

[(1, 21921400), (2, 10960700), (4, 5480350), (5, 4384280), (8, 2740175), (10, 2192140), (20, 1096070), (25, 876856), (40, 548035), (43, 509800), (50, 438428), (86, 254900), (100, 219214), (172, 127450), (200, 109607), (215, 101960), (344, 63725), (430, 50980), (860, 25490), (1075, 20392), (1720, 12745), (2150, 10196), (2549, 8600), (4300, 5098)]