21340816

素因数分解:

$2^4\times 7^1\times {\mathrm{190543}}^1$

素因数の和:190558

約数の個数: 20

約数和(自身を含む): 47254912

約数和(自身を除く): 25914096

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 190543, 381086, 762172, 1333801, 1524344, 2667602, 3048688, 5335204, 10670408, 21340816]

約数ペア:

[(1, 21340816), (2, 10670408), (4, 5335204), (7, 3048688), (8, 2667602), (14, 1524344), (16, 1333801), (28, 762172), (56, 381086), (112, 190543)]