20690428

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{199}}^1$

素因数の和:370

約数の個数: 48

約数和(自身を含む): 42336000

約数和(自身を除く): 21645572

約数列:

[1, 2, 4, 11, 17, 22, 34, 44, 68, 139, 187, 199, 278, 374, 398, 556, 748, 796, 1529, 2189, 2363, 3058, 3383, 4378, 4726, 6116, 6766, 8756, 9452, 13532, 25993, 27661, 37213, 51986, 55322, 74426, 103972, 110644, 148852, 304271, 470237, 608542, 940474, 1217084, 1880948, 5172607, 10345214, 20690428]

約数ペア:

[(1, 20690428), (2, 10345214), (4, 5172607), (11, 1880948), (17, 1217084), (22, 940474), (34, 608542), (44, 470237), (68, 304271), (139, 148852), (187, 110644), (199, 103972), (278, 74426), (374, 55322), (398, 51986), (556, 37213), (748, 27661), (796, 25993), (1529, 13532), (2189, 9452), (2363, 8756), (3058, 6766), (3383, 6116), (4378, 4726)]