20880909

素因数分解:

$3^4\times 7^2\times {\mathrm{5261}}^1$

素因数の和:5287

約数の個数: 30

約数和(自身を含む): 36292014

約数和(自身を除く): 15411105

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 81, 147, 189, 441, 567, 1323, 3969, 5261, 15783, 36827, 47349, 110481, 142047, 257789, 331443, 426141, 773367, 994329, 2320101, 2982987, 6960303, 20880909]

約数ペア:

[(1, 20880909), (3, 6960303), (7, 2982987), (9, 2320101), (21, 994329), (27, 773367), (49, 426141), (63, 331443), (81, 257789), (147, 142047), (189, 110481), (441, 47349), (567, 36827), (1323, 15783), (3969, 5261)]