27981891

素因数分解:

$3^2\times 7^2\times {\mathrm{107}}^1\times {\mathrm{593}}^1$

素因数の和:720

約数の個数: 36

約数和(自身を含む): 47536632

約数和(自身を除く): 19554741

約数列:

[1, 3, 7, 9, 21, 49, 63, 107, 147, 321, 441, 593, 749, 963, 1779, 2247, 4151, 5243, 5337, 6741, 12453, 15729, 29057, 37359, 47187, 63451, 87171, 190353, 261513, 444157, 571059, 1332471, 3109099, 3997413, 9327297, 27981891]

約数ペア:

[(1, 27981891), (3, 9327297), (7, 3997413), (9, 3109099), (21, 1332471), (49, 571059), (63, 444157), (107, 261513), (147, 190353), (321, 87171), (441, 63451), (593, 47187), (749, 37359), (963, 29057), (1779, 15729), (2247, 12453), (4151, 6741), (5243, 5337)]