217779155

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{191}}^1\times {\mathrm{20731}}^1$

素因数の和:20938

約数の個数: 16

約数和(自身を含む): 286599168

約数和(自身を除く): 68820013

約数列:

[1, 5, 11, 55, 191, 955, 2101, 10505, 20731, 103655, 228041, 1140205, 3959621, 19798105, 43555831, 217779155]

約数ペア:

[(1, 217779155), (5, 43555831), (11, 19798105), (55, 3959621), (191, 1140205), (955, 228041), (2101, 103655), (10505, 20731)]