19994821

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{173}}^1$

素因数の和:289

約数の個数: 32

約数和(自身を含む): 26726400

約数和(自身を除く): 6731579

約数列:

[1, 7, 11, 19, 77, 79, 133, 173, 209, 553, 869, 1211, 1463, 1501, 1903, 3287, 6083, 10507, 13321, 13667, 16511, 23009, 36157, 95669, 115577, 150337, 253099, 259673, 1052359, 1817711, 2856403, 19994821]

約数ペア:

[(1, 19994821), (7, 2856403), (11, 1817711), (19, 1052359), (77, 259673), (79, 253099), (133, 150337), (173, 115577), (209, 95669), (553, 36157), (869, 23009), (1211, 16511), (1463, 13667), (1501, 13321), (1903, 10507), (3287, 6083)]