21545433

素因数分解:

$3^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{79}}^1$

素因数の和:148

約数の個数: 80

約数和(自身を含む): 41198080

約数和(自身を除く): 19652647

約数列:

[1, 3, 7, 9, 13, 21, 27, 37, 39, 63, 79, 81, 91, 111, 117, 189, 237, 259, 273, 333, 351, 481, 553, 567, 711, 777, 819, 999, 1027, 1053, 1443, 1659, 2133, 2331, 2457, 2923, 2997, 3081, 3367, 4329, 4977, 6399, 6993, 7189, 7371, 8769, 9243, 10101, 12987, 14931, 20461, 20979, 21567, 26307, 27729, 30303, 37999, 38961, 44793, 61383, 64701, 78921, 83187, 90909, 113997, 184149, 194103, 236763, 265993, 272727, 341991, 552447, 582309, 797979, 1025973, 1657341, 2393937, 3077919, 7181811, 21545433]

約数ペア:

[(1, 21545433), (3, 7181811), (7, 3077919), (9, 2393937), (13, 1657341), (21, 1025973), (27, 797979), (37, 582309), (39, 552447), (63, 341991), (79, 272727), (81, 265993), (91, 236763), (111, 194103), (117, 184149), (189, 113997), (237, 90909), (259, 83187), (273, 78921), (333, 64701), (351, 61383), (481, 44793), (553, 38961), (567, 37999), (711, 30303), (777, 27729), (819, 26307), (999, 21567), (1027, 20979), (1053, 20461), (1443, 14931), (1659, 12987), (2133, 10101), (2331, 9243), (2457, 8769), (2923, 7371), (2997, 7189), (3081, 6993), (3367, 6399), (4329, 4977)]