81278457

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{149}}^1\times {\mathrm{197}}^1$

素因数の和:433

約数の個数: 32

約数和(自身を含む): 119750400

約数和(自身を除く): 38471943

約数列:

[1, 3, 13, 39, 71, 149, 197, 213, 447, 591, 923, 1937, 2561, 2769, 5811, 7683, 10579, 13987, 29353, 31737, 41961, 88059, 137527, 181831, 381589, 412581, 545493, 1144767, 2084063, 6252189, 27092819, 81278457]

約数ペア:

[(1, 81278457), (3, 27092819), (13, 6252189), (39, 2084063), (71, 1144767), (149, 545493), (197, 412581), (213, 381589), (447, 181831), (591, 137527), (923, 88059), (1937, 41961), (2561, 31737), (2769, 29353), (5811, 13987), (7683, 10579)]