20918149

素因数分解:

$7^2\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{293}}^1$

素因数の和:385

約数の個数: 24

約数和(自身を含む): 25740288

約数和(自身を除く): 4822139

約数列:

[1, 7, 31, 47, 49, 217, 293, 329, 1457, 1519, 2051, 2303, 9083, 10199, 13771, 14357, 63581, 71393, 96397, 426901, 445067, 674779, 2988307, 20918149]

約数ペア:

[(1, 20918149), (7, 2988307), (31, 674779), (47, 445067), (49, 426901), (217, 96397), (293, 71393), (329, 63581), (1457, 14357), (1519, 13771), (2051, 10199), (2303, 9083)]