81171279

素因数分解:

$3^2\times 7^1\times {\mathrm{521}}^1\times {\mathrm{2473}}^1$

素因数の和:3007

約数の個数: 24

約数和(自身を含む): 134308512

約数和(自身を除く): 53137233

約数列:

[1, 3, 7, 9, 21, 63, 521, 1563, 2473, 3647, 4689, 7419, 10941, 17311, 22257, 32823, 51933, 155799, 1288433, 3865299, 9019031, 11595897, 27057093, 81171279]

約数ペア:

[(1, 81171279), (3, 27057093), (7, 11595897), (9, 9019031), (21, 3865299), (63, 1288433), (521, 155799), (1563, 51933), (2473, 32823), (3647, 22257), (4689, 17311), (7419, 10941)]