19788759

素因数分解:

$3^3\times {\mathrm{29}}^1\times {\mathrm{127}}^1\times {\mathrm{199}}^1$

素因数の和:364

約数の個数: 32

約数和(自身を含む): 30720000

約数和(自身を除く): 10931241

約数列:

[1, 3, 9, 27, 29, 87, 127, 199, 261, 381, 597, 783, 1143, 1791, 3429, 3683, 5373, 5771, 11049, 17313, 25273, 33147, 51939, 75819, 99441, 155817, 227457, 682371, 732917, 2198751, 6596253, 19788759]

約数ペア:

[(1, 19788759), (3, 6596253), (9, 2198751), (27, 732917), (29, 682371), (87, 227457), (127, 155817), (199, 99441), (261, 75819), (381, 51939), (597, 33147), (783, 25273), (1143, 17313), (1791, 11049), (3429, 5771), (3683, 5373)]