644517

素因数分解:

$3^4\times {\mathrm{73}}^1\times {\mathrm{109}}^1$

素因数の和:194

約数の個数: 20

約数和(自身を含む): 984940

約数和(自身を除く): 340423

約数列:

[1, 3, 9, 27, 73, 81, 109, 219, 327, 657, 981, 1971, 2943, 5913, 7957, 8829, 23871, 71613, 214839, 644517]

約数ペア:

[(1, 644517), (3, 214839), (9, 71613), (27, 23871), (73, 8829), (81, 7957), (109, 5913), (219, 2943), (327, 1971), (657, 981)]