21028029

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{643}}^1\times {\mathrm{991}}^1$

素因数の和:1648

約数の個数: 16

約数和(自身を含む): 30664704

約数和(自身を除く): 9636675

約数列:

[1, 3, 11, 33, 643, 991, 1929, 2973, 7073, 10901, 21219, 32703, 637213, 1911639, 7009343, 21028029]

約数ペア:

[(1, 21028029), (3, 7009343), (11, 1911639), (33, 637213), (643, 32703), (991, 21219), (1929, 10901), (2973, 7073)]