278487

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{97}}^1$

素因数の和:143

約数の個数: 24

約数和(自身を含む): 458640

約数和(自身を除く): 180153

約数列:

[1, 3, 9, 11, 29, 33, 87, 97, 99, 261, 291, 319, 873, 957, 1067, 2813, 2871, 3201, 8439, 9603, 25317, 30943, 92829, 278487]

約数ペア:

[(1, 278487), (3, 92829), (9, 30943), (11, 25317), (29, 9603), (33, 8439), (87, 3201), (97, 2871), (99, 2813), (261, 1067), (291, 957), (319, 873)]