640501775

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{307}}^1\times {\mathrm{4909}}^1$

素因数の和:5243

約数の個数: 24

約数和(自身を含む): 843852240

約数和(自身を除く): 203350465

約数列:

[1, 5, 17, 25, 85, 307, 425, 1535, 4909, 5219, 7675, 24545, 26095, 83453, 122725, 130475, 417265, 1507063, 2086325, 7535315, 25620071, 37676575, 128100355, 640501775]

約数ペア:

[(1, 640501775), (5, 128100355), (17, 37676575), (25, 25620071), (85, 7535315), (307, 2086325), (425, 1507063), (1535, 417265), (4909, 130475), (5219, 122725), (7675, 83453), (24545, 26095)]