18660291

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{293}}^1$

素因数の和:403

約数の個数: 32

約数和(自身を含む): 28449792

約数和(自身を除く): 9789501

約数列:

[1, 3, 13, 23, 39, 69, 71, 213, 293, 299, 879, 897, 923, 1633, 2769, 3809, 4899, 6739, 11427, 20217, 20803, 21229, 62409, 63687, 87607, 262821, 270439, 478469, 811317, 1435407, 6220097, 18660291]

約数ペア:

[(1, 18660291), (3, 6220097), (13, 1435407), (23, 811317), (39, 478469), (69, 270439), (71, 262821), (213, 87607), (293, 63687), (299, 62409), (879, 21229), (897, 20803), (923, 20217), (1633, 11427), (2769, 6739), (3809, 4899)]