21176883

素因数分解:

$3^4\times 7^1\times {\mathrm{13}}^3\times {\mathrm{17}}^1$

素因数の和:75

約数の個数: 80

約数和(自身を含む): 41469120

約数和(自身を除く): 20292237

約数列:

[1, 3, 7, 9, 13, 17, 21, 27, 39, 51, 63, 81, 91, 117, 119, 153, 169, 189, 221, 273, 351, 357, 459, 507, 567, 663, 819, 1053, 1071, 1183, 1377, 1521, 1547, 1989, 2197, 2457, 2873, 3213, 3549, 4563, 4641, 5967, 6591, 7371, 8619, 9639, 10647, 13689, 13923, 15379, 17901, 19773, 20111, 25857, 31941, 37349, 41769, 46137, 59319, 60333, 77571, 95823, 112047, 125307, 138411, 177957, 180999, 232713, 261443, 336141, 415233, 542997, 784329, 1008423, 1245699, 1628991, 2352987, 3025269, 7058961, 21176883]

約数ペア:

[(1, 21176883), (3, 7058961), (7, 3025269), (9, 2352987), (13, 1628991), (17, 1245699), (21, 1008423), (27, 784329), (39, 542997), (51, 415233), (63, 336141), (81, 261443), (91, 232713), (117, 180999), (119, 177957), (153, 138411), (169, 125307), (189, 112047), (221, 95823), (273, 77571), (351, 60333), (357, 59319), (459, 46137), (507, 41769), (567, 37349), (663, 31941), (819, 25857), (1053, 20111), (1071, 19773), (1183, 17901), (1377, 15379), (1521, 13923), (1547, 13689), (1989, 10647), (2197, 9639), (2457, 8619), (2873, 7371), (3213, 6591), (3549, 5967), (4563, 4641)]