17931991

素因数分解:

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

素因数の和:164

約数の個数: 48

約数和(自身を含む): 25608960

約数和(自身を除く): 7676969

約数列:

[1, 7, 11, 17, 19, 49, 77, 103, 119, 133, 187, 209, 323, 539, 721, 833, 931, 1133, 1309, 1463, 1751, 1957, 2261, 3553, 5047, 7931, 9163, 10241, 12257, 13699, 15827, 19261, 21527, 24871, 33269, 55517, 85799, 95893, 134827, 150689, 174097, 232883, 365959, 943789, 1054823, 1630181, 2561713, 17931991]

約数ペア:

[(1, 17931991), (7, 2561713), (11, 1630181), (17, 1054823), (19, 943789), (49, 365959), (77, 232883), (103, 174097), (119, 150689), (133, 134827), (187, 95893), (209, 85799), (323, 55517), (539, 33269), (721, 24871), (833, 21527), (931, 19261), (1133, 15827), (1309, 13699), (1463, 12257), (1751, 10241), (1957, 9163), (2261, 7931), (3553, 5047)]