19929778

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{8311}}^1$

素因数の和:8433

約数の個数: 16

約数和(自身を含む): 32915520

約数和(自身を除く): 12985742

約数列:

[1, 2, 11, 22, 109, 218, 1199, 2398, 8311, 16622, 91421, 182842, 905899, 1811798, 9964889, 19929778]

約数ペア:

[(1, 19929778), (2, 9964889), (11, 1811798), (22, 905899), (109, 182842), (218, 91421), (1199, 16622), (2398, 8311)]