21653217

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{42209}}^1$

素因数の和:42237

約数の個数: 16

約数和(自身を含む): 33768000

約数和(自身を除く): 12114783

約数列:

[1, 3, 9, 19, 27, 57, 171, 513, 42209, 126627, 379881, 801971, 1139643, 2405913, 7217739, 21653217]

約数ペア:

[(1, 21653217), (3, 7217739), (9, 2405913), (19, 1139643), (27, 801971), (57, 379881), (171, 126627), (513, 42209)]