21946545

素因数分解:

$3^9\times 5^1\times {\mathrm{223}}^1$

素因数の和:255

約数の個数: 40

約数和(自身を含む): 39680256

約数和(自身を除く): 17733711

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 223, 243, 405, 669, 729, 1115, 1215, 2007, 2187, 3345, 3645, 6021, 6561, 10035, 10935, 18063, 19683, 30105, 32805, 54189, 90315, 98415, 162567, 270945, 487701, 812835, 1463103, 2438505, 4389309, 7315515, 21946545]

約数ペア:

[(1, 21946545), (3, 7315515), (5, 4389309), (9, 2438505), (15, 1463103), (27, 812835), (45, 487701), (81, 270945), (135, 162567), (223, 98415), (243, 90315), (405, 54189), (669, 32805), (729, 30105), (1115, 19683), (1215, 18063), (2007, 10935), (2187, 10035), (3345, 6561), (3645, 6021)]