21280077

素因数分解:

$3^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2887}}^1$

素因数の和:2919

約数の個数: 40

約数和(自身を含む): 39138176

約数和(自身を除く): 17858099

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 81, 91, 117, 189, 273, 351, 567, 819, 1053, 2457, 2887, 7371, 8661, 20209, 25983, 37531, 60627, 77949, 112593, 181881, 233847, 262717, 337779, 545643, 788151, 1013337, 1636929, 2364453, 3040011, 7093359, 21280077]

約数ペア:

[(1, 21280077), (3, 7093359), (7, 3040011), (9, 2364453), (13, 1636929), (21, 1013337), (27, 788151), (39, 545643), (63, 337779), (81, 262717), (91, 233847), (117, 181881), (189, 112593), (273, 77949), (351, 60627), (567, 37531), (819, 25983), (1053, 20209), (2457, 8661), (2887, 7371)]