20639738

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{2503}}^1$

素因数の和:2562

約数の個数: 32

約数和(自身を含む): 38461440

約数和(自身を除く): 17821702

約数列:

[1, 2, 7, 14, 19, 31, 38, 62, 133, 217, 266, 434, 589, 1178, 2503, 4123, 5006, 8246, 17521, 35042, 47557, 77593, 95114, 155186, 332899, 543151, 665798, 1086302, 1474267, 2948534, 10319869, 20639738]

約数ペア:

[(1, 20639738), (2, 10319869), (7, 2948534), (14, 1474267), (19, 1086302), (31, 665798), (38, 543151), (62, 332899), (133, 155186), (217, 95114), (266, 77593), (434, 47557), (589, 35042), (1178, 17521), (2503, 8246), (4123, 5006)]