18973913

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{331}}^1\times {\mathrm{431}}^1$

素因数の和:788

約数の個数: 16

約数和(自身を含む): 22947840

約数和(自身を除く): 3973927

約数列:

[1, 7, 19, 133, 331, 431, 2317, 3017, 6289, 8189, 44023, 57323, 142661, 998627, 2710559, 18973913]

約数ペア:

[(1, 18973913), (7, 2710559), (19, 998627), (133, 142661), (331, 57323), (431, 44023), (2317, 8189), (3017, 6289)]