16890867

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{137}}^1$

素因数の和:272

約数の個数: 48

約数和(自身を含む): 29852160

約数和(自身を除く): 12961293

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 103, 133, 137, 171, 309, 399, 411, 721, 927, 959, 1197, 1233, 1957, 2163, 2603, 2877, 5871, 6489, 7809, 8631, 13699, 14111, 17613, 18221, 23427, 41097, 42333, 54663, 98777, 123291, 126999, 163989, 268109, 296331, 804327, 888993, 1876763, 2412981, 5630289, 16890867]

約数ペア:

[(1, 16890867), (3, 5630289), (7, 2412981), (9, 1876763), (19, 888993), (21, 804327), (57, 296331), (63, 268109), (103, 163989), (133, 126999), (137, 123291), (171, 98777), (309, 54663), (399, 42333), (411, 41097), (721, 23427), (927, 18221), (959, 17613), (1197, 14111), (1233, 13699), (1957, 8631), (2163, 7809), (2603, 6489), (2877, 5871)]