21278493

素因数分解:

$3^2\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{1439}}^1$

素因数の和:1529

約数の個数: 24

約数和(自身を含む): 32348160

約数和(自身を除く): 11069667

約数列:

[1, 3, 9, 31, 53, 93, 159, 279, 477, 1439, 1643, 4317, 4929, 12951, 14787, 44609, 76267, 133827, 228801, 401481, 686403, 2364277, 7092831, 21278493]

約数ペア:

[(1, 21278493), (3, 7092831), (9, 2364277), (31, 686403), (53, 401481), (93, 228801), (159, 133827), (279, 76267), (477, 44609), (1439, 14787), (1643, 12951), (4317, 4929)]