21081781785

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{419}}^1\times {\mathrm{78007}}^1$

素因数の和:78477

約数の個数: 32

約数和(自身を含む): 34598108160

約数和(自身を除く): 13516326375

約数列:

[1, 3, 5, 15, 43, 129, 215, 419, 645, 1257, 2095, 6285, 18017, 54051, 78007, 90085, 234021, 270255, 390035, 1170105, 3354301, 10062903, 16771505, 32684933, 50314515, 98054799, 163424665, 490273995, 1405452119, 4216356357, 7027260595, 21081781785]

約数ペア:

[(1, 21081781785), (3, 7027260595), (5, 4216356357), (15, 1405452119), (43, 490273995), (129, 163424665), (215, 98054799), (419, 50314515), (645, 32684933), (1257, 16771505), (2095, 10062903), (6285, 3354301), (18017, 1170105), (54051, 390035), (78007, 270255), (90085, 234021)]