21120255

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{457}}^1$

素因数の和:560

約数の個数: 48

約数和(自身を含む): 40010880

約数和(自身を除く): 18890625

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 79, 117, 195, 237, 395, 457, 585, 711, 1027, 1185, 1371, 2285, 3081, 3555, 4113, 5135, 5941, 6855, 9243, 15405, 17823, 20565, 29705, 36103, 46215, 53469, 89115, 108309, 180515, 267345, 324927, 469339, 541545, 1408017, 1624635, 2346695, 4224051, 7040085, 21120255]

約数ペア:

[(1, 21120255), (3, 7040085), (5, 4224051), (9, 2346695), (13, 1624635), (15, 1408017), (39, 541545), (45, 469339), (65, 324927), (79, 267345), (117, 180515), (195, 108309), (237, 89115), (395, 53469), (457, 46215), (585, 36103), (711, 29705), (1027, 20565), (1185, 17823), (1371, 15405), (2285, 9243), (3081, 6855), (3555, 5941), (4113, 5135)]