20697687

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{15031}}^1$

素因数の和:15060

約数の個数: 20

約数和(自身を含む): 32739696

約数和(自身を除く): 12042009

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 459, 1377, 15031, 45093, 135279, 255527, 405837, 766581, 1217511, 2299743, 6899229, 20697687]

約数ペア:

[(1, 20697687), (3, 6899229), (9, 2299743), (17, 1217511), (27, 766581), (51, 405837), (81, 255527), (153, 135279), (459, 45093), (1377, 15031)]