81855

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1$

素因数の和:135

約数の個数: 24

約数和(自身を含む): 151632

約数和(自身を除く): 69777

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 107, 153, 255, 321, 535, 765, 963, 1605, 1819, 4815, 5457, 9095, 16371, 27285, 81855]

約数ペア:

[(1, 81855), (3, 27285), (5, 16371), (9, 9095), (15, 5457), (17, 4815), (45, 1819), (51, 1605), (85, 963), (107, 765), (153, 535), (255, 321)]