21612899

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1$

素因数の和:144

約数の個数: 48

約数和(自身を含む): 30643200

約数和(自身を除く): 9030301

約数列:

[1, 7, 11, 17, 19, 77, 79, 119, 121, 133, 187, 209, 323, 553, 847, 869, 1309, 1343, 1463, 1501, 2057, 2261, 2299, 3553, 6083, 9401, 9559, 10507, 14399, 14773, 16093, 16511, 24871, 25517, 39083, 66913, 103411, 115577, 162503, 178619, 181621, 273581, 280687, 1137521, 1271347, 1964809, 3087557, 21612899]

約数ペア:

[(1, 21612899), (7, 3087557), (11, 1964809), (17, 1271347), (19, 1137521), (77, 280687), (79, 273581), (119, 181621), (121, 178619), (133, 162503), (187, 115577), (209, 103411), (323, 66913), (553, 39083), (847, 25517), (869, 24871), (1309, 16511), (1343, 16093), (1463, 14773), (1501, 14399), (2057, 10507), (2261, 9559), (2299, 9401), (3553, 6083)]