21975681

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{797}}^1$

素因数の和:921

約数の個数: 32

約数和(自身を含む): 36465408

約数和(自身を除く): 14489727

約数列:

[1, 3, 7, 13, 21, 39, 91, 101, 273, 303, 707, 797, 1313, 2121, 2391, 3939, 5579, 9191, 10361, 16737, 27573, 31083, 72527, 80497, 217581, 241491, 563479, 1046461, 1690437, 3139383, 7325227, 21975681]

約数ペア:

[(1, 21975681), (3, 7325227), (7, 3139383), (13, 1690437), (21, 1046461), (39, 563479), (91, 241491), (101, 217581), (273, 80497), (303, 72527), (707, 31083), (797, 27573), (1313, 16737), (2121, 10361), (2391, 9191), (3939, 5579)]