20863563

素因数分解:

$3^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{1999}}^1$

素因数の和:2087

約数の個数: 24

約数和(自身を含む): 32832000

約数和(自身を除く): 11968437

約数列:

[1, 3, 7, 21, 49, 71, 147, 213, 497, 1491, 1999, 3479, 5997, 10437, 13993, 41979, 97951, 141929, 293853, 425787, 993503, 2980509, 6954521, 20863563]

約数ペア:

[(1, 20863563), (3, 6954521), (7, 2980509), (21, 993503), (49, 425787), (71, 293853), (147, 141929), (213, 97951), (497, 41979), (1491, 13993), (1999, 10437), (3479, 5997)]