21148743

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^2\times {\mathrm{29}}^1\times {\mathrm{41}}^1$

素因数の和:109

約数の個数: 72

約数和(自身を含む): 38208240

約数和(自身を除く): 17059497

約数列:

[1, 3, 7, 11, 21, 29, 33, 41, 49, 77, 87, 121, 123, 147, 203, 231, 287, 319, 363, 451, 539, 609, 847, 861, 957, 1189, 1353, 1421, 1617, 2009, 2233, 2541, 3157, 3509, 3567, 4263, 4961, 5929, 6027, 6699, 8323, 9471, 10527, 13079, 14883, 15631, 17787, 22099, 24563, 24969, 34727, 39237, 46893, 58261, 66297, 73689, 91553, 104181, 143869, 171941, 174783, 243089, 274659, 431607, 515823, 640871, 729267, 1007083, 1922613, 3021249, 7049581, 21148743]

約数ペア:

[(1, 21148743), (3, 7049581), (7, 3021249), (11, 1922613), (21, 1007083), (29, 729267), (33, 640871), (41, 515823), (49, 431607), (77, 274659), (87, 243089), (121, 174783), (123, 171941), (147, 143869), (203, 104181), (231, 91553), (287, 73689), (319, 66297), (363, 58261), (451, 46893), (539, 39237), (609, 34727), (847, 24969), (861, 24563), (957, 22099), (1189, 17787), (1353, 15631), (1421, 14883), (1617, 13079), (2009, 10527), (2233, 9471), (2541, 8323), (3157, 6699), (3509, 6027), (3567, 5929), (4263, 4961)]