16778223

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{71}}^1$

素因数の和:137

約数の個数: 72

約数和(自身を含む): 31868928

約数和(自身を除く): 15090705

約数列:

[1, 3, 7, 9, 11, 21, 31, 33, 63, 71, 77, 93, 99, 121, 213, 217, 231, 279, 341, 363, 497, 639, 651, 693, 781, 847, 1023, 1089, 1491, 1953, 2201, 2343, 2387, 2541, 3069, 3751, 4473, 5467, 6603, 7029, 7161, 7623, 8591, 11253, 15407, 16401, 19809, 21483, 24211, 25773, 26257, 33759, 46221, 49203, 60137, 72633, 77319, 78771, 138663, 169477, 180411, 217899, 236313, 266321, 508431, 541233, 798963, 1525293, 1864247, 2396889, 5592741, 16778223]

約数ペア:

[(1, 16778223), (3, 5592741), (7, 2396889), (9, 1864247), (11, 1525293), (21, 798963), (31, 541233), (33, 508431), (63, 266321), (71, 236313), (77, 217899), (93, 180411), (99, 169477), (121, 138663), (213, 78771), (217, 77319), (231, 72633), (279, 60137), (341, 49203), (363, 46221), (497, 33759), (639, 26257), (651, 25773), (693, 24211), (781, 21483), (847, 19809), (1023, 16401), (1089, 15407), (1491, 11253), (1953, 8591), (2201, 7623), (2343, 7161), (2387, 7029), (2541, 6603), (3069, 5467), (3751, 4473)]