21057388

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{139}}^1\times {\mathrm{313}}^1$

素因数の和:478

約数の個数: 36

約数和(自身を含む): 40926760

約数和(自身を除く): 19869372

約数列:

[1, 2, 4, 11, 22, 44, 121, 139, 242, 278, 313, 484, 556, 626, 1252, 1529, 3058, 3443, 6116, 6886, 13772, 16819, 33638, 37873, 43507, 67276, 75746, 87014, 151492, 174028, 478577, 957154, 1914308, 5264347, 10528694, 21057388]

約数ペア:

[(1, 21057388), (2, 10528694), (4, 5264347), (11, 1914308), (22, 957154), (44, 478577), (121, 174028), (139, 151492), (242, 87014), (278, 75746), (313, 67276), (484, 43507), (556, 37873), (626, 33638), (1252, 16819), (1529, 13772), (3058, 6886), (3443, 6116)]