11989905

素因数分解:

$3^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{641}}^1$

素因数の和:721

約数の個数: 32

約数和(自身を含む): 20338560

約数和(自身を除く): 8348655

約数列:

[1, 3, 5, 15, 29, 43, 87, 129, 145, 215, 435, 641, 645, 1247, 1923, 3205, 3741, 6235, 9615, 18589, 18705, 27563, 55767, 82689, 92945, 137815, 278835, 413445, 799327, 2397981, 3996635, 11989905]

約数ペア:

[(1, 11989905), (3, 3996635), (5, 2397981), (15, 799327), (29, 413445), (43, 278835), (87, 137815), (129, 92945), (145, 82689), (215, 55767), (435, 27563), (641, 18705), (645, 18589), (1247, 9615), (1923, 6235), (3205, 3741)]