20128999

素因数分解:

${\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{37}}^1\times {\mathrm{137}}^1$

素因数の和:223

約数の個数: 24

約数和(自身を含む): 23975568

約数和(自身を除く): 3846569

約数列:

[1, 11, 19, 37, 137, 209, 361, 407, 703, 1507, 2603, 3971, 5069, 7733, 13357, 28633, 49457, 55759, 96311, 146927, 544027, 1059421, 1829909, 20128999]

約数ペア:

[(1, 20128999), (11, 1829909), (19, 1059421), (37, 544027), (137, 146927), (209, 96311), (361, 55759), (407, 49457), (703, 28633), (1507, 13357), (2603, 7733), (3971, 5069)]