210681

素因数分解:

$3^6\times {\mathrm{17}}^2$

素因数の和:52

約数の個数: 21

約数和(自身を含む): 335551

約数和(自身を除く): 124870

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 243, 289, 459, 729, 867, 1377, 2601, 4131, 7803, 12393, 23409, 70227, 210681]

約数ペア:

[(1, 210681), (3, 70227), (9, 23409), (17, 12393), (27, 7803), (51, 4131), (81, 2601), (153, 1377), (243, 867), (289, 729)]