68981960

素因数分解:

$2^3\times 5^1\times {\mathrm{661}}^1\times {\mathrm{2609}}^1$

素因数の和:3281

約数の個数: 32

約数和(自身を含む): 155503800

約数和(自身を除く): 86521840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 661, 1322, 2609, 2644, 3305, 5218, 5288, 6610, 10436, 13045, 13220, 20872, 26090, 26440, 52180, 104360, 1724549, 3449098, 6898196, 8622745, 13796392, 17245490, 34490980, 68981960]

約数ペア:

[(1, 68981960), (2, 34490980), (4, 17245490), (5, 13796392), (8, 8622745), (10, 6898196), (20, 3449098), (40, 1724549), (661, 104360), (1322, 52180), (2609, 26440), (2644, 26090), (3305, 20872), (5218, 13220), (5288, 13045), (6610, 10436)]