20209581

素因数分解:

$3^5\times 7^1\times {\mathrm{109}}^2$

素因数の和:240

約数の個数: 36

約数和(自身を含む): 34917792

約数和(自身を除く): 14708211

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 109, 189, 243, 327, 567, 763, 981, 1701, 2289, 2943, 6867, 8829, 11881, 20601, 26487, 35643, 61803, 83167, 106929, 185409, 249501, 320787, 748503, 962361, 2245509, 2887083, 6736527, 20209581]

約数ペア:

[(1, 20209581), (3, 6736527), (7, 2887083), (9, 2245509), (21, 962361), (27, 748503), (63, 320787), (81, 249501), (109, 185409), (189, 106929), (243, 83167), (327, 61803), (567, 35643), (763, 26487), (981, 20601), (1701, 11881), (2289, 8829), (2943, 6867)]