19964571

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{83}}^1\times {\mathrm{197}}^1$

素因数の和:331

約数の個数: 32

約数和(自身を含む): 30336768

約数和(自身を除く): 10372197

約数列:

[1, 3, 11, 33, 37, 83, 111, 197, 249, 407, 591, 913, 1221, 2167, 2739, 3071, 6501, 7289, 9213, 16351, 21867, 33781, 49053, 80179, 101343, 179861, 240537, 539583, 604987, 1814961, 6654857, 19964571]

約数ペア:

[(1, 19964571), (3, 6654857), (11, 1814961), (33, 604987), (37, 539583), (83, 240537), (111, 179861), (197, 101343), (249, 80179), (407, 49053), (591, 33781), (913, 21867), (1221, 16351), (2167, 9213), (2739, 7289), (3071, 6501)]