2781681

素因数分解:

$3^1\times 7^2\times {\mathrm{127}}^1\times {\mathrm{149}}^1$

素因数の和:293

約数の個数: 24

約数和(自身を含む): 4377600

約数和(自身を除く): 1595919

約数列:

[1, 3, 7, 21, 49, 127, 147, 149, 381, 447, 889, 1043, 2667, 3129, 6223, 7301, 18669, 18923, 21903, 56769, 132461, 397383, 927227, 2781681]

約数ペア:

[(1, 2781681), (3, 927227), (7, 397383), (21, 132461), (49, 56769), (127, 21903), (147, 18923), (149, 18669), (381, 7301), (447, 6223), (889, 3129), (1043, 2667)]