20781728

素因数分解:

$2^5\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{1373}}^1$

素因数の和:1437

約数の個数: 48

約数和(自身を含む): 45704736

約数和(自身を除く): 24923008

約数列:

[1, 2, 4, 8, 11, 16, 22, 32, 43, 44, 86, 88, 172, 176, 344, 352, 473, 688, 946, 1373, 1376, 1892, 2746, 3784, 5492, 7568, 10984, 15103, 15136, 21968, 30206, 43936, 59039, 60412, 118078, 120824, 236156, 241648, 472312, 483296, 649429, 944624, 1298858, 1889248, 2597716, 5195432, 10390864, 20781728]

約数ペア:

[(1, 20781728), (2, 10390864), (4, 5195432), (8, 2597716), (11, 1889248), (16, 1298858), (22, 944624), (32, 649429), (43, 483296), (44, 472312), (86, 241648), (88, 236156), (172, 120824), (176, 118078), (344, 60412), (352, 59039), (473, 43936), (688, 30206), (946, 21968), (1373, 15136), (1376, 15103), (1892, 10984), (2746, 7568), (3784, 5492)]