81699891

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{2153}}^1$

素因数の和:2315

約数の個数: 32

約数和(自身を含む): 135098880

約数和(自身を除く): 53398989

約数列:

[1, 3, 7, 13, 21, 39, 91, 139, 273, 417, 973, 1807, 2153, 2919, 5421, 6459, 12649, 15071, 27989, 37947, 45213, 83967, 195923, 299267, 587769, 897801, 2094869, 3890471, 6284607, 11671413, 27233297, 81699891]

約数ペア:

[(1, 81699891), (3, 27233297), (7, 11671413), (13, 6284607), (21, 3890471), (39, 2094869), (91, 897801), (139, 587769), (273, 299267), (417, 195923), (973, 83967), (1807, 45213), (2153, 37947), (2919, 27989), (5421, 15071), (6459, 12649)]