21686548

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{197}}^1$

素因数の和:316

約数の個数: 48

約数和(自身を含む): 43076880

約数和(自身を除く): 21390332

約数列:

[1, 2, 4, 13, 26, 29, 52, 58, 73, 116, 146, 197, 292, 377, 394, 754, 788, 949, 1508, 1898, 2117, 2561, 3796, 4234, 5122, 5713, 8468, 10244, 11426, 14381, 22852, 27521, 28762, 55042, 57524, 74269, 110084, 148538, 186953, 297076, 373906, 417049, 747812, 834098, 1668196, 5421637, 10843274, 21686548]

約数ペア:

[(1, 21686548), (2, 10843274), (4, 5421637), (13, 1668196), (26, 834098), (29, 747812), (52, 417049), (58, 373906), (73, 297076), (116, 186953), (146, 148538), (197, 110084), (292, 74269), (377, 57524), (394, 55042), (754, 28762), (788, 27521), (949, 22852), (1508, 14381), (1898, 11426), (2117, 10244), (2561, 8468), (3796, 5713), (4234, 5122)]