28736981

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{229}}^1$

素因数の和:453

約数の個数: 24

約数和(自身を含む): 36340920

約数和(自身を除く): 7603939

約数列:

[1, 7, 13, 49, 91, 197, 229, 637, 1379, 1603, 2561, 2977, 9653, 11221, 17927, 20839, 45113, 125489, 145873, 315791, 586469, 2210537, 4105283, 28736981]

約数ペア:

[(1, 28736981), (7, 4105283), (13, 2210537), (49, 586469), (91, 315791), (197, 145873), (229, 125489), (637, 45113), (1379, 20839), (1603, 17927), (2561, 11221), (2977, 9653)]