18585008

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{449}}^1$

素因数の和:669

約数の個数: 40

約数和(自身を含む): 39060000

約数和(自身を除く): 20474992

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 199, 208, 398, 449, 796, 898, 1592, 1796, 2587, 3184, 3592, 5174, 5837, 7184, 10348, 11674, 20696, 23348, 41392, 46696, 89351, 93392, 178702, 357404, 714808, 1161563, 1429616, 2323126, 4646252, 9292504, 18585008]

約数ペア:

[(1, 18585008), (2, 9292504), (4, 4646252), (8, 2323126), (13, 1429616), (16, 1161563), (26, 714808), (52, 357404), (104, 178702), (199, 93392), (208, 89351), (398, 46696), (449, 41392), (796, 23348), (898, 20696), (1592, 11674), (1796, 10348), (2587, 7184), (3184, 5837), (3592, 5174)]