20644528

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{1069}}^1$

素因数の和:1165

約数の個数: 40

約数和(自身を含む): 42988320

約数和(自身を除く): 22343792

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 71, 136, 142, 272, 284, 568, 1069, 1136, 1207, 2138, 2414, 4276, 4828, 8552, 9656, 17104, 18173, 19312, 36346, 72692, 75899, 145384, 151798, 290768, 303596, 607192, 1214384, 1290283, 2580566, 5161132, 10322264, 20644528]

約数ペア:

[(1, 20644528), (2, 10322264), (4, 5161132), (8, 2580566), (16, 1290283), (17, 1214384), (34, 607192), (68, 303596), (71, 290768), (136, 151798), (142, 145384), (272, 75899), (284, 72692), (568, 36346), (1069, 19312), (1136, 18173), (1207, 17104), (2138, 9656), (2414, 8552), (4276, 4828)]