20617947

素因数分解:

$3^2\times 7^1\times {\mathrm{83}}^1\times {\mathrm{3943}}^1$

素因数の和:4039

約数の個数: 24

約数和(自身を含む): 34454784

約数和(自身を除く): 13836837

約数列:

[1, 3, 7, 9, 21, 63, 83, 249, 581, 747, 1743, 3943, 5229, 11829, 27601, 35487, 82803, 248409, 327269, 981807, 2290883, 2945421, 6872649, 20617947]

約数ペア:

[(1, 20617947), (3, 6872649), (7, 2945421), (9, 2290883), (21, 981807), (63, 327269), (83, 248409), (249, 82803), (581, 35487), (747, 27601), (1743, 11829), (3943, 5229)]