128870360

素因数分解:

$2^3\times 5^1\times {\mathrm{211}}^1\times {\mathrm{15269}}^1$

素因数の和:15491

約数の個数: 32

約数和(自身を含む): 291351600

約数和(自身を除く): 162481240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 211, 422, 844, 1055, 1688, 2110, 4220, 8440, 15269, 30538, 61076, 76345, 122152, 152690, 305380, 610760, 3221759, 6443518, 12887036, 16108795, 25774072, 32217590, 64435180, 128870360]

約数ペア:

[(1, 128870360), (2, 64435180), (4, 32217590), (5, 25774072), (8, 16108795), (10, 12887036), (20, 6443518), (40, 3221759), (211, 610760), (422, 305380), (844, 152690), (1055, 122152), (1688, 76345), (2110, 61076), (4220, 30538), (8440, 15269)]