251168281

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{127}}^1\times {\mathrm{211}}^1$

素因数の和:461

約数の個数: 32

約数和(自身を含む): 316080128

約数和(自身を除く): 64911847

約数列:

[1, 7, 13, 91, 103, 127, 211, 721, 889, 1339, 1477, 1651, 2743, 9373, 11557, 13081, 19201, 21733, 26797, 91567, 152131, 170053, 187579, 282529, 348361, 1190371, 1977703, 2438527, 2760091, 19320637, 35881183, 251168281]

約数ペア:

[(1, 251168281), (7, 35881183), (13, 19320637), (91, 2760091), (103, 2438527), (127, 1977703), (211, 1190371), (721, 348361), (889, 282529), (1339, 187579), (1477, 170053), (1651, 152131), (2743, 91567), (9373, 26797), (11557, 21733), (13081, 19201)]