21339549

素因数分解:

$3^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{83}}^1$

素因数の和:167

約数の個数: 72

約数和(自身を含む): 40334112

約数和(自身を除く): 18994563

約数列:

[1, 3, 7, 9, 11, 21, 33, 49, 53, 63, 77, 83, 99, 147, 159, 231, 249, 371, 441, 477, 539, 581, 583, 693, 747, 913, 1113, 1617, 1743, 1749, 2597, 2739, 3339, 4067, 4081, 4399, 4851, 5229, 5247, 6391, 7791, 8217, 12201, 12243, 13197, 19173, 23373, 28567, 30793, 36603, 36729, 39591, 44737, 48389, 57519, 85701, 92379, 134211, 145167, 215551, 257103, 277137, 338723, 402633, 435501, 646653, 1016169, 1939959, 2371061, 3048507, 7113183, 21339549]

約数ペア:

[(1, 21339549), (3, 7113183), (7, 3048507), (9, 2371061), (11, 1939959), (21, 1016169), (33, 646653), (49, 435501), (53, 402633), (63, 338723), (77, 277137), (83, 257103), (99, 215551), (147, 145167), (159, 134211), (231, 92379), (249, 85701), (371, 57519), (441, 48389), (477, 44737), (539, 39591), (581, 36729), (583, 36603), (693, 30793), (747, 28567), (913, 23373), (1113, 19173), (1617, 13197), (1743, 12243), (1749, 12201), (2597, 8217), (2739, 7791), (3339, 6391), (4067, 5247), (4081, 5229), (4399, 4851)]