21178377

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{131}}^1$

素因数の和:242

約数の個数: 48

約数和(自身を含む): 35582976

約数和(自身を除く): 14404599

約数列:

[1, 3, 9, 11, 23, 33, 69, 71, 99, 131, 207, 213, 253, 393, 639, 759, 781, 1179, 1441, 1633, 2277, 2343, 3013, 4323, 4899, 7029, 9039, 9301, 12969, 14697, 17963, 27117, 27903, 33143, 53889, 83709, 99429, 102311, 161667, 213923, 298287, 306933, 641769, 920799, 1925307, 2353153, 7059459, 21178377]

約数ペア:

[(1, 21178377), (3, 7059459), (9, 2353153), (11, 1925307), (23, 920799), (33, 641769), (69, 306933), (71, 298287), (99, 213923), (131, 161667), (207, 102311), (213, 99429), (253, 83709), (393, 53889), (639, 33143), (759, 27903), (781, 27117), (1179, 17963), (1441, 14697), (1633, 12969), (2277, 9301), (2343, 9039), (3013, 7029), (4323, 4899)]