21909978

素因数分解:

$2^1\times 3^2\times {\mathrm{157}}^1\times {\mathrm{7753}}^1$

素因数の和:7918

約数の個数: 24

約数和(自身を含む): 47780148

約数和(自身を除く): 25870170

約数列:

[1, 2, 3, 6, 9, 18, 157, 314, 471, 942, 1413, 2826, 7753, 15506, 23259, 46518, 69777, 139554, 1217221, 2434442, 3651663, 7303326, 10954989, 21909978]

約数ペア:

[(1, 21909978), (2, 10954989), (3, 7303326), (6, 3651663), (9, 2434442), (18, 1217221), (157, 139554), (314, 69777), (471, 46518), (942, 23259), (1413, 15506), (2826, 7753)]