21559601

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{1361}}^1$

素因数の和:1472

約数の個数: 16

約数和(自身を含む): 25801728

約数和(自身を除く): 4242127

約数列:

[1, 7, 31, 73, 217, 511, 1361, 2263, 9527, 15841, 42191, 99353, 295337, 695471, 3079943, 21559601]

約数ペア:

[(1, 21559601), (7, 3079943), (31, 695471), (73, 295337), (217, 99353), (511, 42191), (1361, 15841), (2263, 9527)]