20953809

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{15217}}^1$

素因数の和:15246

約数の個数: 20

約数和(自身を含む): 33144804

約数和(自身を除く): 12190995

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 459, 1377, 15217, 45651, 136953, 258689, 410859, 776067, 1232577, 2328201, 6984603, 20953809]

約数ペア:

[(1, 20953809), (3, 6984603), (9, 2328201), (17, 1232577), (27, 776067), (51, 410859), (81, 258689), (153, 136953), (459, 45651), (1377, 15217)]