21171351

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{337}}^1\times {\mathrm{487}}^1$

素因数の和:870

約数の個数: 16

約数和(自身を含む): 29030144

約数和(自身を除く): 7858793

約数列:

[1, 3, 43, 129, 337, 487, 1011, 1461, 14491, 20941, 43473, 62823, 164119, 492357, 7057117, 21171351]

約数ペア:

[(1, 21171351), (3, 7057117), (43, 492357), (129, 164119), (337, 62823), (487, 43473), (1011, 20941), (1461, 14491)]