19990138

素因数分解:

$2^1\times 7^2\times {\mathrm{37}}^2\times {\mathrm{149}}^1$

素因数の和:239

約数の個数: 36

約数和(自身を含む): 36089550

約数和(自身を除く): 16099412

約数列:

[1, 2, 7, 14, 37, 49, 74, 98, 149, 259, 298, 518, 1043, 1369, 1813, 2086, 2738, 3626, 5513, 7301, 9583, 11026, 14602, 19166, 38591, 67081, 77182, 134162, 203981, 270137, 407962, 540274, 1427867, 2855734, 9995069, 19990138]

約数ペア:

[(1, 19990138), (2, 9995069), (7, 2855734), (14, 1427867), (37, 540274), (49, 407962), (74, 270137), (98, 203981), (149, 134162), (259, 77182), (298, 67081), (518, 38591), (1043, 19166), (1369, 14602), (1813, 11026), (2086, 9583), (2738, 7301), (3626, 5513)]