20781956

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23509}}^1$

素因数の和:23543

約数の個数: 24

約数和(自身を含む): 41471640

約数和(自身を除く): 20689684

約数列:

[1, 2, 4, 13, 17, 26, 34, 52, 68, 221, 442, 884, 23509, 47018, 94036, 305617, 399653, 611234, 799306, 1222468, 1598612, 5195489, 10390978, 20781956]

約数ペア:

[(1, 20781956), (2, 10390978), (4, 5195489), (13, 1598612), (17, 1222468), (26, 799306), (34, 611234), (52, 399653), (68, 305617), (221, 94036), (442, 47018), (884, 23509)]