7931721

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{193}}^1$

素因数の和:325

約数の個数: 32

約数和(自身を含む): 12912640

約数和(自身を除く): 4980919

約数列:

[1, 3, 7, 19, 21, 57, 103, 133, 193, 309, 399, 579, 721, 1351, 1957, 2163, 3667, 4053, 5871, 11001, 13699, 19879, 25669, 41097, 59637, 77007, 139153, 377701, 417459, 1133103, 2643907, 7931721]

約数ペア:

[(1, 7931721), (3, 2643907), (7, 1133103), (19, 417459), (21, 377701), (57, 139153), (103, 77007), (133, 59637), (193, 41097), (309, 25669), (399, 19879), (579, 13699), (721, 11001), (1351, 5871), (1957, 4053), (2163, 3667)]