21402992

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{2393}}^1$

素因数の和:2457

約数の個数: 40

約数和(自身を含む): 45715824

約数和(自身を除く): 24312832

約数列:

[1, 2, 4, 8, 13, 16, 26, 43, 52, 86, 104, 172, 208, 344, 559, 688, 1118, 2236, 2393, 4472, 4786, 8944, 9572, 19144, 31109, 38288, 62218, 102899, 124436, 205798, 248872, 411596, 497744, 823192, 1337687, 1646384, 2675374, 5350748, 10701496, 21402992]

約数ペア:

[(1, 21402992), (2, 10701496), (4, 5350748), (8, 2675374), (13, 1646384), (16, 1337687), (26, 823192), (43, 497744), (52, 411596), (86, 248872), (104, 205798), (172, 124436), (208, 102899), (344, 62218), (559, 38288), (688, 31109), (1118, 19144), (2236, 9572), (2393, 8944), (4472, 4786)]