21961317

素因数分解:

$3^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{6661}}^1$

素因数の和:6828

約数の個数: 16

約数和(自身を含む): 33683072

約数和(自身を除く): 11721755

約数列:

[1, 3, 7, 21, 157, 471, 1099, 3297, 6661, 19983, 46627, 139881, 1045777, 3137331, 7320439, 21961317]

約数ペア:

[(1, 21961317), (3, 7320439), (7, 3137331), (21, 1045777), (157, 139881), (471, 46627), (1099, 19983), (3297, 6661)]