21216327

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{27953}}^1$

素因数の和:27990

約数の個数: 16

約数和(自身を含む): 32203008

約数和(自身を除く): 10986681

約数列:

[1, 3, 11, 23, 33, 69, 253, 759, 27953, 83859, 307483, 642919, 922449, 1928757, 7072109, 21216327]

約数ペア:

[(1, 21216327), (3, 7072109), (11, 1928757), (23, 922449), (33, 642919), (69, 307483), (253, 83859), (759, 27953)]