21220335

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{27739}}^1$

素因数の和:27767

約数の個数: 24

約数和(自身を含む): 38946960

約数和(自身を除く): 17726625

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 27739, 83217, 138695, 249651, 416085, 471563, 1248255, 1414689, 2357815, 4244067, 7073445, 21220335]

約数ペア:

[(1, 21220335), (3, 7073445), (5, 4244067), (9, 2357815), (15, 1414689), (17, 1248255), (45, 471563), (51, 416085), (85, 249651), (153, 138695), (255, 83217), (765, 27739)]