28072121

素因数分解:

$7^1\times {\mathrm{11}}^3\times {\mathrm{23}}^1\times {\mathrm{131}}^1$

素因数の和:194

約数の個数: 32

約数和(自身を含む): 37103616

約数和(自身を除く): 9031495

約数列:

[1, 7, 11, 23, 77, 121, 131, 161, 253, 847, 917, 1331, 1441, 1771, 2783, 3013, 9317, 10087, 15851, 19481, 21091, 30613, 33143, 110957, 174361, 214291, 232001, 364573, 1220527, 2552011, 4010303, 28072121]

約数ペア:

[(1, 28072121), (7, 4010303), (11, 2552011), (23, 1220527), (77, 364573), (121, 232001), (131, 214291), (161, 174361), (253, 110957), (847, 33143), (917, 30613), (1331, 21091), (1441, 19481), (1771, 15851), (2783, 10087), (3013, 9317)]