16685781

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{31}}^1\times {\mathrm{71}}^1$

素因数の和:150

約数の個数: 48

約数和(自身を含む): 28090368

約数和(自身を除く): 11404587

約数列:

[1, 3, 7, 19, 21, 31, 57, 71, 93, 133, 213, 217, 361, 399, 497, 589, 651, 1083, 1349, 1491, 1767, 2201, 2527, 4047, 4123, 6603, 7581, 9443, 11191, 12369, 15407, 25631, 28329, 33573, 41819, 46221, 76893, 78337, 125457, 179417, 235011, 292733, 538251, 794561, 878199, 2383683, 5561927, 16685781]

約数ペア:

[(1, 16685781), (3, 5561927), (7, 2383683), (19, 878199), (21, 794561), (31, 538251), (57, 292733), (71, 235011), (93, 179417), (133, 125457), (213, 78337), (217, 76893), (361, 46221), (399, 41819), (497, 33573), (589, 28329), (651, 25631), (1083, 15407), (1349, 12369), (1491, 11191), (1767, 9443), (2201, 7581), (2527, 6603), (4047, 4123)]