21117687

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{127}}^1\times {\mathrm{1289}}^1$

素因数の和:1462

約数の個数: 16

約数和(自身を含む): 29061120

約数和(自身を除く): 7943433

約数列:

[1, 3, 43, 127, 129, 381, 1289, 3867, 5461, 16383, 55427, 163703, 166281, 491109, 7039229, 21117687]

約数ペア:

[(1, 21117687), (3, 7039229), (43, 491109), (127, 166281), (129, 163703), (381, 55427), (1289, 16383), (3867, 5461)]