20648408

素因数分解:

$2^3\times {\mathrm{11}}^2\times {\mathrm{83}}^1\times {\mathrm{257}}^1$

素因数の和:368

約数の個数: 48

約数和(自身を含む): 43235640

約数和(自身を除く): 22587232

約数列:

[1, 2, 4, 8, 11, 22, 44, 83, 88, 121, 166, 242, 257, 332, 484, 514, 664, 913, 968, 1028, 1826, 2056, 2827, 3652, 5654, 7304, 10043, 11308, 20086, 21331, 22616, 31097, 40172, 42662, 62194, 80344, 85324, 124388, 170648, 234641, 248776, 469282, 938564, 1877128, 2581051, 5162102, 10324204, 20648408]

約数ペア:

[(1, 20648408), (2, 10324204), (4, 5162102), (8, 2581051), (11, 1877128), (22, 938564), (44, 469282), (83, 248776), (88, 234641), (121, 170648), (166, 124388), (242, 85324), (257, 80344), (332, 62194), (484, 42662), (514, 40172), (664, 31097), (913, 22616), (968, 21331), (1028, 20086), (1826, 11308), (2056, 10043), (2827, 7304), (3652, 5654)]