28319787

素因数分解:

$3^4\times {\mathrm{211}}^1\times {\mathrm{1657}}^1$

素因数の和:1880

約数の個数: 20

約数和(自身を含む): 42531016

約数和(自身を除く): 14211229

約数列:

[1, 3, 9, 27, 81, 211, 633, 1657, 1899, 4971, 5697, 14913, 17091, 44739, 134217, 349627, 1048881, 3146643, 9439929, 28319787]

約数ペア:

[(1, 28319787), (3, 9439929), (9, 3146643), (27, 1048881), (81, 349627), (211, 134217), (633, 44739), (1657, 17091), (1899, 14913), (4971, 5697)]