81427784

素因数分解:

$2^3\times {\mathrm{509}}^1\times {\mathrm{19997}}^1$

素因数の和:20512

約数の個数: 16

約数和(自身を含む): 152984700

約数和(自身を除く): 71556916

約数列:

[1, 2, 4, 8, 509, 1018, 2036, 4072, 19997, 39994, 79988, 159976, 10178473, 20356946, 40713892, 81427784]

約数ペア:

[(1, 81427784), (2, 40713892), (4, 20356946), (8, 10178473), (509, 159976), (1018, 79988), (2036, 39994), (4072, 19997)]