21809214

素因数分解:

$2^1\times 3^2\times 7^2\times {\mathrm{79}}^1\times {\mathrm{313}}^1$

素因数の和:414

約数の個数: 72

約数和(自身を含む): 55841760

約数和(自身を除く): 34032546

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 49, 63, 79, 98, 126, 147, 158, 237, 294, 313, 441, 474, 553, 626, 711, 882, 939, 1106, 1422, 1659, 1878, 2191, 2817, 3318, 3871, 4382, 4977, 5634, 6573, 7742, 9954, 11613, 13146, 15337, 19719, 23226, 24727, 30674, 34839, 39438, 46011, 49454, 69678, 74181, 92022, 138033, 148362, 173089, 222543, 276066, 346178, 445086, 519267, 1038534, 1211623, 1557801, 2423246, 3115602, 3634869, 7269738, 10904607, 21809214]

約数ペア:

[(1, 21809214), (2, 10904607), (3, 7269738), (6, 3634869), (7, 3115602), (9, 2423246), (14, 1557801), (18, 1211623), (21, 1038534), (42, 519267), (49, 445086), (63, 346178), (79, 276066), (98, 222543), (126, 173089), (147, 148362), (158, 138033), (237, 92022), (294, 74181), (313, 69678), (441, 49454), (474, 46011), (553, 39438), (626, 34839), (711, 30674), (882, 24727), (939, 23226), (1106, 19719), (1422, 15337), (1659, 13146), (1878, 11613), (2191, 9954), (2817, 7742), (3318, 6573), (3871, 5634), (4382, 4977)]