19687779

素因数分解:

$3^4\times {\mathrm{89}}^1\times {\mathrm{2731}}^1$

素因数の和:2832

約数の個数: 20

約数和(自身を含む): 29751480

約数和(自身を除く): 10063701

約数列:

[1, 3, 9, 27, 81, 89, 267, 801, 2403, 2731, 7209, 8193, 24579, 73737, 221211, 243059, 729177, 2187531, 6562593, 19687779]

約数ペア:

[(1, 19687779), (3, 6562593), (9, 2187531), (27, 729177), (81, 243059), (89, 221211), (267, 73737), (801, 24579), (2403, 8193), (2731, 7209)]