21781925

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{769}}^1$

素因数の和:893

約数の個数: 24

約数和(自身を含む): 29789760

約数和(自身を除く): 8007835

約数列:

[1, 5, 11, 25, 55, 103, 275, 515, 769, 1133, 2575, 3845, 5665, 8459, 19225, 28325, 42295, 79207, 211475, 396035, 871277, 1980175, 4356385, 21781925]

約数ペア:

[(1, 21781925), (5, 4356385), (11, 1980175), (25, 871277), (55, 396035), (103, 211475), (275, 79207), (515, 42295), (769, 28325), (1133, 19225), (2575, 8459), (3845, 5665)]