21190851

素因数分解:

$3^2\times {\mathrm{11}}^3\times {\mathrm{29}}^1\times {\mathrm{61}}^1$

素因数の和:129

約数の個数: 48

約数和(自身を含む): 35399520

約数和(自身を除く): 14208669

約数列:

[1, 3, 9, 11, 29, 33, 61, 87, 99, 121, 183, 261, 319, 363, 549, 671, 957, 1089, 1331, 1769, 2013, 2871, 3509, 3993, 5307, 6039, 7381, 10527, 11979, 15921, 19459, 22143, 31581, 38599, 58377, 66429, 81191, 115797, 175131, 214049, 243573, 347391, 642147, 730719, 1926441, 2354539, 7063617, 21190851]

約数ペア:

[(1, 21190851), (3, 7063617), (9, 2354539), (11, 1926441), (29, 730719), (33, 642147), (61, 347391), (87, 243573), (99, 214049), (121, 175131), (183, 115797), (261, 81191), (319, 66429), (363, 58377), (549, 38599), (671, 31581), (957, 22143), (1089, 19459), (1331, 15921), (1769, 11979), (2013, 10527), (2871, 7381), (3509, 6039), (3993, 5307)]