20288528

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{947}}^1$

素因数の和:1071

約数の個数: 40

約数和(自身を含む): 42788928

約数和(自身を除く): 22500400

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 103, 104, 206, 208, 412, 824, 947, 1339, 1648, 1894, 2678, 3788, 5356, 7576, 10712, 12311, 15152, 21424, 24622, 49244, 97541, 98488, 195082, 196976, 390164, 780328, 1268033, 1560656, 2536066, 5072132, 10144264, 20288528]

約数ペア:

[(1, 20288528), (2, 10144264), (4, 5072132), (8, 2536066), (13, 1560656), (16, 1268033), (26, 780328), (52, 390164), (103, 196976), (104, 195082), (206, 98488), (208, 97541), (412, 49244), (824, 24622), (947, 21424), (1339, 15152), (1648, 12311), (1894, 10712), (2678, 7576), (3788, 5356)]