18997701

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{337}}^1$

素因数の和:425

約数の個数: 32

約数和(自身を含む): 28554240

約数和(自身を除く): 9556539

約数列:

[1, 3, 19, 23, 43, 57, 69, 129, 337, 437, 817, 989, 1011, 1311, 2451, 2967, 6403, 7751, 14491, 18791, 19209, 23253, 43473, 56373, 147269, 275329, 333293, 441807, 825987, 999879, 6332567, 18997701]

約数ペア:

[(1, 18997701), (3, 6332567), (19, 999879), (23, 825987), (43, 441807), (57, 333293), (69, 275329), (129, 147269), (337, 56373), (437, 43473), (817, 23253), (989, 19209), (1011, 18791), (1311, 14491), (2451, 7751), (2967, 6403)]