18721978

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{10253}}^1$

素因数の和:10349

約数の個数: 16

約数和(自身を含む): 31008096

約数和(自身を除く): 12286118

約数列:

[1, 2, 11, 22, 83, 166, 913, 1826, 10253, 20506, 112783, 225566, 850999, 1701998, 9360989, 18721978]

約数ペア:

[(1, 18721978), (2, 9360989), (11, 1701998), (22, 850999), (83, 225566), (166, 112783), (913, 20506), (1826, 10253)]