21047103

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^3\times {\mathrm{251}}^1$

素因数の和:297

約数の個数: 48

約数和(自身を含む): 38368512

約数和(自身を除く): 17321409

約数列:

[1, 3, 7, 9, 11, 21, 33, 63, 77, 99, 121, 231, 251, 363, 693, 753, 847, 1089, 1331, 1757, 2259, 2541, 2761, 3993, 5271, 7623, 8283, 9317, 11979, 15813, 19327, 24849, 27951, 30371, 57981, 83853, 91113, 173943, 212597, 273339, 334081, 637791, 1002243, 1913373, 2338567, 3006729, 7015701, 21047103]

約数ペア:

[(1, 21047103), (3, 7015701), (7, 3006729), (9, 2338567), (11, 1913373), (21, 1002243), (33, 637791), (63, 334081), (77, 273339), (99, 212597), (121, 173943), (231, 91113), (251, 83853), (363, 57981), (693, 30371), (753, 27951), (847, 24849), (1089, 19327), (1331, 15813), (1757, 11979), (2259, 9317), (2541, 8283), (2761, 7623), (3993, 5271)]