256439745

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{132527}}^1$

素因数の和:132581

約数の個数: 24

約数和(自身を含む): 454836096

約数和(自身を除く): 198396351

約数列:

[1, 3, 5, 9, 15, 43, 45, 129, 215, 387, 645, 1935, 132527, 397581, 662635, 1192743, 1987905, 5698661, 5963715, 17095983, 28493305, 51287949, 85479915, 256439745]

約数ペア:

[(1, 256439745), (3, 85479915), (5, 51287949), (9, 28493305), (15, 17095983), (43, 5963715), (45, 5698661), (129, 1987905), (215, 1192743), (387, 662635), (645, 397581), (1935, 132527)]