21377675

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{191}}^1$

素因数の和:260

約数の個数: 36

約数和(自身を含む): 30081408

約数和(自身を除く): 8703733

約数列:

[1, 5, 11, 25, 37, 55, 121, 185, 191, 275, 407, 605, 925, 955, 2035, 2101, 3025, 4477, 4775, 7067, 10175, 10505, 22385, 23111, 35335, 52525, 77737, 111925, 115555, 176675, 388685, 577775, 855107, 1943425, 4275535, 21377675]

約数ペア:

[(1, 21377675), (5, 4275535), (11, 1943425), (25, 855107), (37, 577775), (55, 388685), (121, 176675), (185, 115555), (191, 111925), (275, 77737), (407, 52525), (605, 35335), (925, 23111), (955, 22385), (2035, 10505), (2101, 10175), (3025, 7067), (4477, 4775)]