21038187

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{7853}}^1$

素因数の和:7922

約数の個数: 16

約数和(自身を含む): 30159360

約数和(自身を除く): 9121173

約数列:

[1, 3, 19, 47, 57, 141, 893, 2679, 7853, 23559, 149207, 369091, 447621, 1107273, 7012729, 21038187]

約数ペア:

[(1, 21038187), (3, 7012729), (19, 1107273), (47, 447621), (57, 369091), (141, 149207), (893, 23559), (2679, 7853)]