28149219

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{10391}}^1$

素因数の和:10447

約数の個数: 24

約数和(自身を含む): 47553792

約数和(自身を除く): 19404573

約数列:

[1, 3, 7, 9, 21, 43, 63, 129, 301, 387, 903, 2709, 10391, 31173, 72737, 93519, 218211, 446813, 654633, 1340439, 3127691, 4021317, 9383073, 28149219]

約数ペア:

[(1, 28149219), (3, 9383073), (7, 4021317), (9, 3127691), (21, 1340439), (43, 654633), (63, 446813), (129, 218211), (301, 93519), (387, 72737), (903, 31173), (2709, 10391)]