21785477

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{157}}^1\times {\mathrm{461}}^1$

素因数の和:668

約数の個数: 16

約数和(自身を含む): 25694592

約数和(自身を除く): 3909115

約数列:

[1, 7, 43, 157, 301, 461, 1099, 3227, 6751, 19823, 47257, 72377, 138761, 506639, 3112211, 21785477]

約数ペア:

[(1, 21785477), (7, 3112211), (43, 506639), (157, 138761), (301, 72377), (461, 47257), (1099, 19823), (3227, 6751)]