18991654

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{27847}}^1$

素因数の和:27891

約数の個数: 16

約数和(自身を含む): 32080896

約数和(自身を除く): 13089242

約数列:

[1, 2, 11, 22, 31, 62, 341, 682, 27847, 55694, 306317, 612634, 863257, 1726514, 9495827, 18991654]

約数ペア:

[(1, 18991654), (2, 9495827), (11, 1726514), (22, 863257), (31, 612634), (62, 306317), (341, 55694), (682, 27847)]