21058947

素因数分解:

$3^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2857}}^1$

素因数の和:2889

約数の個数: 40

約数和(自身を含む): 38731616

約数和(自身を除く): 17672669

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 81, 91, 117, 189, 273, 351, 567, 819, 1053, 2457, 2857, 7371, 8571, 19999, 25713, 37141, 59997, 77139, 111423, 179991, 231417, 259987, 334269, 539973, 779961, 1002807, 1619919, 2339883, 3008421, 7019649, 21058947]

約数ペア:

[(1, 21058947), (3, 7019649), (7, 3008421), (9, 2339883), (13, 1619919), (21, 1002807), (27, 779961), (39, 539973), (63, 334269), (81, 259987), (91, 231417), (117, 179991), (189, 111423), (273, 77139), (351, 59997), (567, 37141), (819, 25713), (1053, 19999), (2457, 8571), (2857, 7371)]