20878047

素因数分解:

$3^3\times {\mathrm{71}}^1\times {\mathrm{10891}}^1$

素因数の和:10971

約数の個数: 16

約数和(自身を含む): 31368960

約数和(自身を除く): 10490913

約数列:

[1, 3, 9, 27, 71, 213, 639, 1917, 10891, 32673, 98019, 294057, 773261, 2319783, 6959349, 20878047]

約数ペア:

[(1, 20878047), (3, 6959349), (9, 2319783), (27, 773261), (71, 294057), (213, 98019), (639, 32673), (1917, 10891)]