28178577

素因数分解:

$3^3\times 7^2\times {\mathrm{19}}^2\times {\mathrm{59}}^1$

素因数の和:120

約数の個数: 72

約数和(自身を含む): 52120800

約数和(自身を除く): 23942223

約数列:

[1, 3, 7, 9, 19, 21, 27, 49, 57, 59, 63, 133, 147, 171, 177, 189, 361, 399, 413, 441, 513, 531, 931, 1083, 1121, 1197, 1239, 1323, 1593, 2527, 2793, 2891, 3249, 3363, 3591, 3717, 7581, 7847, 8379, 8673, 9747, 10089, 11151, 17689, 21299, 22743, 23541, 25137, 26019, 30267, 53067, 54929, 63897, 68229, 70623, 78057, 149093, 159201, 164787, 191691, 211869, 447279, 477603, 494361, 575073, 1043651, 1341837, 1483083, 3130953, 4025511, 9392859, 28178577]

約数ペア:

[(1, 28178577), (3, 9392859), (7, 4025511), (9, 3130953), (19, 1483083), (21, 1341837), (27, 1043651), (49, 575073), (57, 494361), (59, 477603), (63, 447279), (133, 211869), (147, 191691), (171, 164787), (177, 159201), (189, 149093), (361, 78057), (399, 70623), (413, 68229), (441, 63897), (513, 54929), (531, 53067), (931, 30267), (1083, 26019), (1121, 25137), (1197, 23541), (1239, 22743), (1323, 21299), (1593, 17689), (2527, 11151), (2793, 10089), (2891, 9747), (3249, 8673), (3363, 8379), (3591, 7847), (3717, 7581)]