21563739

素因数分解:

$3^4\times {\mathrm{53}}^1\times {\mathrm{5023}}^1$

素因数の和:5088

約数の個数: 20

約数和(自身を含む): 32826816

約数和(自身を除く): 11263077

約数列:

[1, 3, 9, 27, 53, 81, 159, 477, 1431, 4293, 5023, 15069, 45207, 135621, 266219, 406863, 798657, 2395971, 7187913, 21563739]

約数ペア:

[(1, 21563739), (3, 7187913), (9, 2395971), (27, 798657), (53, 406863), (81, 266219), (159, 135621), (477, 45207), (1431, 15069), (4293, 5023)]