18768519

素因数分解:

$3^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{73}}^1$

素因数の和:157

約数の個数: 72

約数和(自身を含む): 35532432

約数和(自身を除く): 16763913

約数列:

[1, 3, 7, 9, 11, 21, 33, 49, 53, 63, 73, 77, 99, 147, 159, 219, 231, 371, 441, 477, 511, 539, 583, 657, 693, 803, 1113, 1533, 1617, 1749, 2409, 2597, 3339, 3577, 3869, 4081, 4599, 4851, 5247, 5621, 7227, 7791, 10731, 11607, 12243, 16863, 23373, 27083, 28567, 32193, 34821, 36729, 39347, 42559, 50589, 81249, 85701, 118041, 127677, 189581, 243747, 257103, 297913, 354123, 383031, 568743, 893739, 1706229, 2085391, 2681217, 6256173, 18768519]

約数ペア:

[(1, 18768519), (3, 6256173), (7, 2681217), (9, 2085391), (11, 1706229), (21, 893739), (33, 568743), (49, 383031), (53, 354123), (63, 297913), (73, 257103), (77, 243747), (99, 189581), (147, 127677), (159, 118041), (219, 85701), (231, 81249), (371, 50589), (441, 42559), (477, 39347), (511, 36729), (539, 34821), (583, 32193), (657, 28567), (693, 27083), (803, 23373), (1113, 16863), (1533, 12243), (1617, 11607), (1749, 10731), (2409, 7791), (2597, 7227), (3339, 5621), (3577, 5247), (3869, 4851), (4081, 4599)]