18917392

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{883}}^1$

素因数の和:1007

約数の個数: 40

約数和(自身を含む): 39900224

約数和(自身を除く): 20982832

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 103, 104, 206, 208, 412, 824, 883, 1339, 1648, 1766, 2678, 3532, 5356, 7064, 10712, 11479, 14128, 21424, 22958, 45916, 90949, 91832, 181898, 183664, 363796, 727592, 1182337, 1455184, 2364674, 4729348, 9458696, 18917392]

約数ペア:

[(1, 18917392), (2, 9458696), (4, 4729348), (8, 2364674), (13, 1455184), (16, 1182337), (26, 727592), (52, 363796), (103, 183664), (104, 181898), (206, 91832), (208, 90949), (412, 45916), (824, 22958), (883, 21424), (1339, 14128), (1648, 11479), (1766, 10712), (2678, 7064), (3532, 5356)]