20994736

素因数分解:

$2^4\times 7^2\times {\mathrm{61}}^1\times {\mathrm{439}}^1$

素因数の和:522

約数の個数: 60

約数和(自身を含む): 48203760

約数和(自身を除く): 27209024

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 49, 56, 61, 98, 112, 122, 196, 244, 392, 427, 439, 488, 784, 854, 878, 976, 1708, 1756, 2989, 3073, 3416, 3512, 5978, 6146, 6832, 7024, 11956, 12292, 21511, 23912, 24584, 26779, 43022, 47824, 49168, 53558, 86044, 107116, 172088, 187453, 214232, 344176, 374906, 428464, 749812, 1312171, 1499624, 2624342, 2999248, 5248684, 10497368, 20994736]

約数ペア:

[(1, 20994736), (2, 10497368), (4, 5248684), (7, 2999248), (8, 2624342), (14, 1499624), (16, 1312171), (28, 749812), (49, 428464), (56, 374906), (61, 344176), (98, 214232), (112, 187453), (122, 172088), (196, 107116), (244, 86044), (392, 53558), (427, 49168), (439, 47824), (488, 43022), (784, 26779), (854, 24584), (878, 23912), (976, 21511), (1708, 12292), (1756, 11956), (2989, 7024), (3073, 6832), (3416, 6146), (3512, 5978)]