211905

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{277}}^1$

素因数の和:305

約数の個数: 24

約数和(自身を含む): 390312

約数和(自身を除く): 178407

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 277, 765, 831, 1385, 2493, 4155, 4709, 12465, 14127, 23545, 42381, 70635, 211905]

約数ペア:

[(1, 211905), (3, 70635), (5, 42381), (9, 23545), (15, 14127), (17, 12465), (45, 4709), (51, 4155), (85, 2493), (153, 1385), (255, 831), (277, 765)]