21055293

素因数分解:

$3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{10781}}^1$

素因数の和:10825

約数の個数: 24

約数和(自身を含む): 35882496

約数和(自身を除く): 14827203

約数列:

[1, 3, 7, 9, 21, 31, 63, 93, 217, 279, 651, 1953, 10781, 32343, 75467, 97029, 226401, 334211, 679203, 1002633, 2339477, 3007899, 7018431, 21055293]

約数ペア:

[(1, 21055293), (3, 7018431), (7, 3007899), (9, 2339477), (21, 1002633), (31, 679203), (63, 334211), (93, 226401), (217, 97029), (279, 75467), (651, 32343), (1953, 10781)]