87997721

素因数分解:

$7^1\times {\mathrm{19}}^2\times {\mathrm{97}}^1\times {\mathrm{359}}^1$

素因数の和:501

約数の個数: 24

約数和(自身を含む): 107533440

約数和(自身を除く): 19535719

約数列:

[1, 7, 19, 97, 133, 359, 361, 679, 1843, 2513, 2527, 6821, 12901, 34823, 35017, 47747, 129599, 243761, 245119, 661637, 907193, 4631459, 12571103, 87997721]

約数ペア:

[(1, 87997721), (7, 12571103), (19, 4631459), (97, 907193), (133, 661637), (359, 245119), (361, 243761), (679, 129599), (1843, 47747), (2513, 35017), (2527, 34823), (6821, 12901)]