20931428

素因数分解:

$2^2\times 7^2\times {\mathrm{269}}^1\times {\mathrm{397}}^1$

素因数の和:684

約数の個数: 36

約数和(自身を含む): 42876540

約数和(自身を除く): 21945112

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 269, 397, 538, 794, 1076, 1588, 1883, 2779, 3766, 5558, 7532, 11116, 13181, 19453, 26362, 38906, 52724, 77812, 106793, 213586, 427172, 747551, 1495102, 2990204, 5232857, 10465714, 20931428]

約数ペア:

[(1, 20931428), (2, 10465714), (4, 5232857), (7, 2990204), (14, 1495102), (28, 747551), (49, 427172), (98, 213586), (196, 106793), (269, 77812), (397, 52724), (538, 38906), (794, 26362), (1076, 19453), (1588, 13181), (1883, 11116), (2779, 7532), (3766, 5558)]