20781459

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{2293}}^1$

素因数の和:2371

約数の個数: 24

約数和(自身を含む): 32207760

約数和(自身を除く): 11426301

約数列:

[1, 3, 9, 19, 53, 57, 159, 171, 477, 1007, 2293, 3021, 6879, 9063, 20637, 43567, 121529, 130701, 364587, 392103, 1093761, 2309051, 6927153, 20781459]

約数ペア:

[(1, 20781459), (3, 6927153), (9, 2309051), (19, 1093761), (53, 392103), (57, 364587), (159, 130701), (171, 121529), (477, 43567), (1007, 20637), (2293, 9063), (3021, 6879)]