857208009

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{306913}}^1$

素因数の和:306949

約数の個数: 24

約数和(自身を含む): 1399527840

約数和(自身を除く): 542319831

約数列:

[1, 3, 7, 19, 21, 49, 57, 133, 147, 399, 931, 2793, 306913, 920739, 2148391, 5831347, 6445173, 15038737, 17494041, 40819429, 45116211, 122458287, 285736003, 857208009]

約数ペア:

[(1, 857208009), (3, 285736003), (7, 122458287), (19, 45116211), (21, 40819429), (49, 17494041), (57, 15038737), (133, 6445173), (147, 5831347), (399, 2148391), (931, 920739), (2793, 306913)]