18720328

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{1069}}^1$

素因数の和:1285

約数の個数: 32

約数和(自身を含む): 38520000

約数和(自身を除く): 19799672

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 199, 398, 796, 1069, 1592, 2138, 2189, 4276, 4378, 8552, 8756, 11759, 17512, 23518, 47036, 94072, 212731, 425462, 850924, 1701848, 2340041, 4680082, 9360164, 18720328]

約数ペア:

[(1, 18720328), (2, 9360164), (4, 4680082), (8, 2340041), (11, 1701848), (22, 850924), (44, 425462), (88, 212731), (199, 94072), (398, 47036), (796, 23518), (1069, 17512), (1592, 11759), (2138, 8756), (2189, 8552), (4276, 4378)]