81472391

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{409}}^1$

素因数の和:639

約数の個数: 32

約数和(自身を含む): 110208000

約数和(自身を除く): 28735609

約数列:

[1, 7, 11, 13, 77, 91, 143, 199, 409, 1001, 1393, 2189, 2587, 2863, 4499, 5317, 15323, 18109, 28457, 31493, 37219, 58487, 81391, 199199, 409409, 569737, 895301, 1058083, 6267107, 7406581, 11638913, 81472391]

約数ペア:

[(1, 81472391), (7, 11638913), (11, 7406581), (13, 6267107), (77, 1058083), (91, 895301), (143, 569737), (199, 409409), (409, 199199), (1001, 81391), (1393, 58487), (2189, 37219), (2587, 31493), (2863, 28457), (4499, 18109), (5317, 15323)]