21541545

素因数分解:

$3^4\times 5^1\times {\mathrm{53189}}^1$

素因数の和:53206

約数の個数: 20

約数和(自身を含む): 38615940

約数和(自身を除く): 17074395

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 53189, 159567, 265945, 478701, 797835, 1436103, 2393505, 4308309, 7180515, 21541545]

約数ペア:

[(1, 21541545), (3, 7180515), (5, 4308309), (9, 2393505), (15, 1436103), (27, 797835), (45, 478701), (81, 265945), (135, 159567), (405, 53189)]