28389515

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{3881}}^1$

素因数の和:3923

約数の個数: 32

約数和(自身を含む): 44720640

約数和(自身を除く): 16331125

約数列:

[1, 5, 7, 11, 19, 35, 55, 77, 95, 133, 209, 385, 665, 1045, 1463, 3881, 7315, 19405, 27167, 42691, 73739, 135835, 213455, 298837, 368695, 516173, 811129, 1494185, 2580865, 4055645, 5677903, 28389515]

約数ペア:

[(1, 28389515), (5, 5677903), (7, 4055645), (11, 2580865), (19, 1494185), (35, 811129), (55, 516173), (77, 368695), (95, 298837), (133, 213455), (209, 135835), (385, 73739), (665, 42691), (1045, 27167), (1463, 19405), (3881, 7315)]