28721457

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{1559}}^1$

素因数の和:1677

約数の個数: 24

約数和(自身を含む): 43804800

約数和(自身を除く): 15083343

約数列:

[1, 3, 9, 23, 69, 89, 207, 267, 801, 1559, 2047, 4677, 6141, 14031, 18423, 35857, 107571, 138751, 322713, 416253, 1248759, 3191273, 9573819, 28721457]

約数ペア:

[(1, 28721457), (3, 9573819), (9, 3191273), (23, 1248759), (69, 416253), (89, 322713), (207, 138751), (267, 107571), (801, 35857), (1559, 18423), (2047, 14031), (4677, 6141)]