19803556

素因数分解:

$2^2\times {\mathrm{53}}^1\times {\mathrm{109}}^1\times {\mathrm{857}}^1$

素因数の和:1023

約数の個数: 24

約数和(自身を含む): 35675640

約数和(自身を除く): 15872084

約数列:

[1, 2, 4, 53, 106, 109, 212, 218, 436, 857, 1714, 3428, 5777, 11554, 23108, 45421, 90842, 93413, 181684, 186826, 373652, 4950889, 9901778, 19803556]

約数ペア:

[(1, 19803556), (2, 9901778), (4, 4950889), (53, 373652), (106, 186826), (109, 181684), (212, 93413), (218, 90842), (436, 45421), (857, 23108), (1714, 11554), (3428, 5777)]