21400687

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{449}}^1\times {\mathrm{619}}^1$

素因数の和:1086

約数の個数: 16

約数和(自身を含む): 26784000

約数和(自身を除く): 5383313

約数列:

[1, 7, 11, 77, 449, 619, 3143, 4333, 4939, 6809, 34573, 47663, 277931, 1945517, 3057241, 21400687]

約数ペア:

[(1, 21400687), (7, 3057241), (11, 1945517), (77, 277931), (449, 47663), (619, 34573), (3143, 6809), (4333, 4939)]