21294387

素因数分解:

$3^3\times {\mathrm{17}}^2\times {\mathrm{2729}}^1$

素因数の和:2772

約数の個数: 24

約数和(自身を含む): 33524400

約数和(自身を除く): 12230013

約数列:

[1, 3, 9, 17, 27, 51, 153, 289, 459, 867, 2601, 2729, 7803, 8187, 24561, 46393, 73683, 139179, 417537, 788681, 1252611, 2366043, 7098129, 21294387]

約数ペア:

[(1, 21294387), (3, 7098129), (9, 2366043), (17, 1252611), (27, 788681), (51, 417537), (153, 139179), (289, 73683), (459, 46393), (867, 24561), (2601, 8187), (2729, 7803)]