81805689

素因数分解:

$3^2\times 7^1\times {\mathrm{359}}^1\times {\mathrm{3617}}^1$

素因数の和:3989

約数の個数: 24

約数和(自身を含む): 135457920

約数和(自身を除く): 53652231

約数列:

[1, 3, 7, 9, 21, 63, 359, 1077, 2513, 3231, 3617, 7539, 10851, 22617, 25319, 32553, 75957, 227871, 1298503, 3895509, 9089521, 11686527, 27268563, 81805689]

約数ペア:

[(1, 81805689), (3, 27268563), (7, 11686527), (9, 9089521), (21, 3895509), (63, 1298503), (359, 227871), (1077, 75957), (2513, 32553), (3231, 25319), (3617, 22617), (7539, 10851)]