28178843

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1$

素因数の和:168

約数の個数: 48

約数和(自身を含む): 39836160

約数和(自身を除く): 11657317

約数列:

[1, 7, 11, 17, 19, 77, 103, 119, 121, 133, 187, 209, 323, 721, 847, 1133, 1309, 1463, 1751, 1957, 2057, 2261, 2299, 3553, 7931, 12257, 12463, 13699, 14399, 16093, 19261, 21527, 24871, 33269, 39083, 87241, 134827, 150689, 211871, 232883, 236797, 273581, 365959, 1483097, 1657579, 2561713, 4025549, 28178843]

約数ペア:

[(1, 28178843), (7, 4025549), (11, 2561713), (17, 1657579), (19, 1483097), (77, 365959), (103, 273581), (119, 236797), (121, 232883), (133, 211871), (187, 150689), (209, 134827), (323, 87241), (721, 39083), (847, 33269), (1133, 24871), (1309, 21527), (1463, 19261), (1751, 16093), (1957, 14399), (2057, 13699), (2261, 12463), (2299, 12257), (3553, 7931)]