208163215

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{337}}^1$

素因数の和:428

約数の個数: 48

約数和(自身を含む): 293930208

約数和(自身を除く): 85766993

約数列:

[1, 5, 13, 17, 43, 65, 85, 169, 215, 221, 337, 559, 731, 845, 1105, 1685, 2795, 2873, 3655, 4381, 5729, 7267, 9503, 14365, 14491, 21905, 28645, 36335, 47515, 56953, 72455, 74477, 123539, 188383, 246347, 284765, 372385, 617695, 941915, 968201, 1231735, 2448979, 3202511, 4841005, 12244895, 16012555, 41632643, 208163215]

約数ペア:

[(1, 208163215), (5, 41632643), (13, 16012555), (17, 12244895), (43, 4841005), (65, 3202511), (85, 2448979), (169, 1231735), (215, 968201), (221, 941915), (337, 617695), (559, 372385), (731, 284765), (845, 246347), (1105, 188383), (1685, 123539), (2795, 74477), (2873, 72455), (3655, 56953), (4381, 47515), (5729, 36335), (7267, 28645), (9503, 21905), (14365, 14491)]