21077739

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{15307}}^1$

素因数の和:15336

約数の個数: 20

約数和(自身を含む): 33340824

約数和(自身を除く): 12263085

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 459, 1377, 15307, 45921, 137763, 260219, 413289, 780657, 1239867, 2341971, 7025913, 21077739]

約数ペア:

[(1, 21077739), (3, 7025913), (9, 2341971), (17, 1239867), (27, 780657), (51, 413289), (81, 260219), (153, 137763), (459, 45921), (1377, 15307)]