18531261

素因数分解:

$3^4\times 7^3\times {\mathrm{23}}^1\times {\mathrm{29}}^1$

素因数の和:85

約数の個数: 80

約数和(自身を含む): 34848000

約数和(自身を除く): 16316739

約数列:

[1, 3, 7, 9, 21, 23, 27, 29, 49, 63, 69, 81, 87, 147, 161, 189, 203, 207, 261, 343, 441, 483, 567, 609, 621, 667, 783, 1029, 1127, 1323, 1421, 1449, 1827, 1863, 2001, 2349, 3087, 3381, 3969, 4263, 4347, 4669, 5481, 6003, 7889, 9261, 9947, 10143, 12789, 13041, 14007, 16443, 18009, 23667, 27783, 29841, 30429, 32683, 38367, 42021, 54027, 71001, 89523, 91287, 98049, 115101, 126063, 213003, 228781, 268569, 294147, 378189, 639009, 686343, 805707, 882441, 2059029, 2647323, 6177087, 18531261]

約数ペア:

[(1, 18531261), (3, 6177087), (7, 2647323), (9, 2059029), (21, 882441), (23, 805707), (27, 686343), (29, 639009), (49, 378189), (63, 294147), (69, 268569), (81, 228781), (87, 213003), (147, 126063), (161, 115101), (189, 98049), (203, 91287), (207, 89523), (261, 71001), (343, 54027), (441, 42021), (483, 38367), (567, 32683), (609, 30429), (621, 29841), (667, 27783), (783, 23667), (1029, 18009), (1127, 16443), (1323, 14007), (1421, 13041), (1449, 12789), (1827, 10143), (1863, 9947), (2001, 9261), (2349, 7889), (3087, 6003), (3381, 5481), (3969, 4669), (4263, 4347)]