21220892

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{68899}}^1$

素因数の和:68921

約数の個数: 24

約数和(自身を含む): 46300800

約数和(自身を除く): 25079908

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 154, 308, 68899, 137798, 275596, 482293, 757889, 964586, 1515778, 1929172, 3031556, 5305223, 10610446, 21220892]

約数ペア:

[(1, 21220892), (2, 10610446), (4, 5305223), (7, 3031556), (11, 1929172), (14, 1515778), (22, 964586), (28, 757889), (44, 482293), (77, 275596), (154, 137798), (308, 68899)]