81561579

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1\times {\mathrm{997}}^1$

素因数の和:1115

約数の個数: 32

約数和(自身を含む): 123783936

約数和(自身を除く): 42222357

約数列:

[1, 3, 11, 33, 37, 67, 111, 201, 407, 737, 997, 1221, 2211, 2479, 2991, 7437, 10967, 27269, 32901, 36889, 66799, 81807, 110667, 200397, 405779, 734789, 1217337, 2204367, 2471563, 7414689, 27187193, 81561579]

約数ペア:

[(1, 81561579), (3, 27187193), (11, 7414689), (33, 2471563), (37, 2204367), (67, 1217337), (111, 734789), (201, 405779), (407, 200397), (737, 110667), (997, 81807), (1221, 66799), (2211, 36889), (2479, 32901), (2991, 27269), (7437, 10967)]