28920087

素因数分解:

$3^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{9767}}^1$

素因数の和:9827

約数の個数: 24

約数和(自身を含む): 48761856

約数和(自身を除く): 19841769

約数列:

[1, 3, 7, 9, 21, 47, 63, 141, 329, 423, 987, 2961, 9767, 29301, 68369, 87903, 205107, 459049, 615321, 1377147, 3213343, 4131441, 9640029, 28920087]

約数ペア:

[(1, 28920087), (3, 9640029), (7, 4131441), (9, 3213343), (21, 1377147), (47, 615321), (63, 459049), (141, 205107), (329, 87903), (423, 68369), (987, 29301), (2961, 9767)]