81189983

素因数分解:

$7^1\times {\mathrm{19}}^4\times {\mathrm{89}}^1$

素因数の和:172

約数の個数: 20

約数和(自身を含む): 99043920

約数和(自身を除く): 17853937

約数列:

[1, 7, 19, 89, 133, 361, 623, 1691, 2527, 6859, 11837, 32129, 48013, 130321, 224903, 610451, 912247, 4273157, 11598569, 81189983]

約数ペア:

[(1, 81189983), (7, 11598569), (19, 4273157), (89, 912247), (133, 610451), (361, 224903), (623, 130321), (1691, 48013), (2527, 32129), (6859, 11837)]