18490978

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{109}}^1\times {\mathrm{701}}^1$

素因数の和:834

約数の個数: 24

約数和(自身を含む): 30810780

約数和(自身を除く): 12319802

約数列:

[1, 2, 11, 22, 109, 121, 218, 242, 701, 1199, 1402, 2398, 7711, 13189, 15422, 26378, 76409, 84821, 152818, 169642, 840499, 1680998, 9245489, 18490978]

約数ペア:

[(1, 18490978), (2, 9245489), (11, 1680998), (22, 840499), (109, 169642), (121, 152818), (218, 84821), (242, 76409), (701, 26378), (1199, 15422), (1402, 13189), (2398, 7711)]