19888856

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{199}}^1$

素因数の和:280

約数の個数: 48

約数和(自身を含む): 41706000

約数和(自身を除く): 21817144

約数列:

[1, 2, 4, 8, 13, 26, 31, 52, 62, 104, 124, 199, 248, 398, 403, 796, 806, 961, 1592, 1612, 1922, 2587, 3224, 3844, 5174, 6169, 7688, 10348, 12338, 12493, 20696, 24676, 24986, 49352, 49972, 80197, 99944, 160394, 191239, 320788, 382478, 641576, 764956, 1529912, 2486107, 4972214, 9944428, 19888856]

約数ペア:

[(1, 19888856), (2, 9944428), (4, 4972214), (8, 2486107), (13, 1529912), (26, 764956), (31, 641576), (52, 382478), (62, 320788), (104, 191239), (124, 160394), (199, 99944), (248, 80197), (398, 49972), (403, 49352), (796, 24986), (806, 24676), (961, 20696), (1592, 12493), (1612, 12338), (1922, 10348), (2587, 7688), (3224, 6169), (3844, 5174)]