28737009

素因数分解:

$3^2\times 7^1\times {\mathrm{349}}^1\times {\mathrm{1307}}^1$

素因数の和:1669

約数の個数: 24

約数和(自身を含む): 47611200

約数和(自身を除く): 18874191

約数列:

[1, 3, 7, 9, 21, 63, 349, 1047, 1307, 2443, 3141, 3921, 7329, 9149, 11763, 21987, 27447, 82341, 456143, 1368429, 3193001, 4105287, 9579003, 28737009]

約数ペア:

[(1, 28737009), (3, 9579003), (7, 4105287), (9, 3193001), (21, 1368429), (63, 456143), (349, 82341), (1047, 27447), (1307, 21987), (2443, 11763), (3141, 9149), (3921, 7329)]