20368971

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{103}}^1$

素因数の和:232

約数の個数: 48

約数和(自身を含む): 35216896

約数和(自身を除く): 14847925

約数列:

[1, 3, 7, 9, 21, 43, 63, 73, 103, 129, 219, 301, 309, 387, 511, 657, 721, 903, 927, 1533, 2163, 2709, 3139, 4429, 4599, 6489, 7519, 9417, 13287, 21973, 22557, 28251, 31003, 39861, 52633, 65919, 67671, 93009, 157899, 197757, 279027, 323317, 473697, 969951, 2263219, 2909853, 6789657, 20368971]

約数ペア:

[(1, 20368971), (3, 6789657), (7, 2909853), (9, 2263219), (21, 969951), (43, 473697), (63, 323317), (73, 279027), (103, 197757), (129, 157899), (219, 93009), (301, 67671), (309, 65919), (387, 52633), (511, 39861), (657, 31003), (721, 28251), (903, 22557), (927, 21973), (1533, 13287), (2163, 9417), (2709, 7519), (3139, 6489), (4429, 4599)]