12720159

素因数分解:

$3^4\times {\mathrm{53}}^1\times {\mathrm{2963}}^1$

素因数の和:3028

約数の個数: 20

約数和(自身を含む): 19366776

約数和(自身を除く): 6646617

約数列:

[1, 3, 9, 27, 53, 81, 159, 477, 1431, 2963, 4293, 8889, 26667, 80001, 157039, 240003, 471117, 1413351, 4240053, 12720159]

約数ペア:

[(1, 12720159), (3, 4240053), (9, 1413351), (27, 471117), (53, 240003), (81, 157039), (159, 80001), (477, 26667), (1431, 8889), (2963, 4293)]