21864513

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{28807}}^1$

素因数の和:28844

約数の個数: 16

約数和(自身を含む): 33186816

約数和(自身を除く): 11322303

約数列:

[1, 3, 11, 23, 33, 69, 253, 759, 28807, 86421, 316877, 662561, 950631, 1987683, 7288171, 21864513]

約数ペア:

[(1, 21864513), (3, 7288171), (11, 1987683), (23, 950631), (33, 662561), (69, 316877), (253, 86421), (759, 28807)]