20968871

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{193}}^1$

素因数の和:311

約数の個数: 32

約数和(自身を含む): 28159488

約数和(自身を除く): 7190617

約数列:

[1, 7, 11, 17, 77, 83, 119, 187, 193, 581, 913, 1309, 1351, 1411, 2123, 3281, 6391, 9877, 14861, 15521, 16019, 22967, 36091, 108647, 112133, 176209, 252637, 272323, 1233463, 1906261, 2995553, 20968871]

約数ペア:

[(1, 20968871), (7, 2995553), (11, 1906261), (17, 1233463), (77, 272323), (83, 252637), (119, 176209), (187, 112133), (193, 108647), (581, 36091), (913, 22967), (1309, 16019), (1351, 15521), (1411, 14861), (2123, 9877), (3281, 6391)]