19493560

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{263}}^1$

素因数の和:400

約数の個数: 64

約数和(自身を含む): 47044800

約数和(自身を除く): 27551240

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 109, 136, 170, 218, 263, 340, 436, 526, 545, 680, 872, 1052, 1090, 1315, 1853, 2104, 2180, 2630, 3706, 4360, 4471, 5260, 7412, 8942, 9265, 10520, 14824, 17884, 18530, 22355, 28667, 35768, 37060, 44710, 57334, 74120, 89420, 114668, 143335, 178840, 229336, 286670, 487339, 573340, 974678, 1146680, 1949356, 2436695, 3898712, 4873390, 9746780, 19493560]

約数ペア:

[(1, 19493560), (2, 9746780), (4, 4873390), (5, 3898712), (8, 2436695), (10, 1949356), (17, 1146680), (20, 974678), (34, 573340), (40, 487339), (68, 286670), (85, 229336), (109, 178840), (136, 143335), (170, 114668), (218, 89420), (263, 74120), (340, 57334), (436, 44710), (526, 37060), (545, 35768), (680, 28667), (872, 22355), (1052, 18530), (1090, 17884), (1315, 14824), (1853, 10520), (2104, 9265), (2180, 8942), (2630, 7412), (3706, 5260), (4360, 4471)]