20856561

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{27479}}^1$

素因数の和:27516

約数の個数: 16

約数和(自身を含む): 31656960

約数和(自身を除く): 10800399

約数列:

[1, 3, 11, 23, 33, 69, 253, 759, 27479, 82437, 302269, 632017, 906807, 1896051, 6952187, 20856561]

約数ペア:

[(1, 20856561), (3, 6952187), (11, 1896051), (23, 906807), (33, 632017), (69, 302269), (253, 82437), (759, 27479)]