28688247

素因数分解:

$3^2\times 7^1\times {\mathrm{659}}^1\times {\mathrm{691}}^1$

素因数の和:1363

約数の個数: 24

約数和(自身を含む): 47498880

約数和(自身を除く): 18810633

約数列:

[1, 3, 7, 9, 21, 63, 659, 691, 1977, 2073, 4613, 4837, 5931, 6219, 13839, 14511, 41517, 43533, 455369, 1366107, 3187583, 4098321, 9562749, 28688247]

約数ペア:

[(1, 28688247), (3, 9562749), (7, 4098321), (9, 3187583), (21, 1366107), (63, 455369), (659, 43533), (691, 41517), (1977, 14511), (2073, 13839), (4613, 6219), (4837, 5931)]